UPSC Questions & Answers – Practice for Civil Services

721. A hollow sphere of external and internal diameters of 10 cm and 6 cm, respectively, is melted and made into another solid in the shape of a right circular cone of base diameter 10 cm. Find the height of the cone.

(A) 13.68 cm
(B) 14.68 cm
(C) 16.68 cm
(D) 15.68 cm

722. Simplify

(A) 80.41
(B) 46.29
(C) 53.25
(D) 70.25

723. If 855 ÷ 15 − k + 32 × 5 = 1152 ÷ 16 × 111 ÷ 37, then the value of k is:

(A) 2
(B) 1
(C) 0
(D) 3

724. Ronak and Riya can do a work in 12 and 18 days, respectively. They worked together for six days and then Ronak left. Find the time taken by Riya to complete the work.

(A) 5 days
(B) 7 days
(C) 6 days
(D) 3 days

725. Two towns P and Q are 275 km apart. A motorcycle rider starts from P towards Q at 10:00 a.m. at the speed of 25 km/h. Another rider starts from Q towards P at 12 noon on the same day at the speed of 20 km/h. At what time will they cross each other?

(A) 3:00 p.m.
(B) 5:00 p.m.
(C) 1:15 p.m.
(D) 4:30 p.m.

726. In a class, there are 60 students. The average weight of the entire class is 42 kg. If there are 36 boys in the class and the average weight of all the boys is 50 kg, then what is the average weight (in kg) of all the girls?

(A) 30
(B) 32
(C) 36
(D) 34

727. A shopkeeper gives a discount of 12% on the purchase of 10 kg of sugar. The cost price of the sugar is ₹30/kg, and the marked price is ₹38/kg. The weighing machine of the shopkeeper is faulty, and it shows weight of 1 kg when the actual weight is 900 grams. Find the percentage profit of the shop keeper (rounded off to two decimal places).

(A) 30.18%
(B) 12.5%
(C) 22.25%
(D) 23.85%

728. Simplify (4 + 4) × (4 ÷ 4) × (4 × 4).

(A) 144
(B) 130
(C) 128
(D) 124

729. A man travels 1200 km by train at 80 km/h, 1600 km by ship at 40 km/h, 1000 km by plane at 400 km/h, and 200 km by car at 50 km/h. What is the average speed for the entire distance? (rounded off to 2 decimal places)

(A) 75.40 km/h
(B) 68.14 km/h
(C) 72.40 km/h
(D) 65.04 km/h

730. If the radius of a sphere is increased by 125%, then by what percentage will its surface area increase (correct to two decimal places)?

(A) 506.25%
(B) 509.54%
(C) 409.76%
(D) 406.25%

Total Quizz:- 10040

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UPSC

The Union Public Service Commission (UPSC) Civil Services Examination is India’s most prestigious and competitive examination, conducted to recruit officers for the country’s top administrative services including IAS, IPS, IFS, IRS and other Central Civil Services.

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The UPSC exam evaluates a candidate’s intellectual ability, analytical thinking, ethical understanding, and awareness of national and international issues, making it one of the toughest examinations in the country.

721. A hollow sphere of external and internal diameters of 10 cm and 6 cm, respectively, is melted and made into another solid in the shape of a right circular cone of base diameter 10 cm. Find the height of the cone.

722. Simplify

723. If 855 ÷ 15 − k + 32 × 5 = 1152 ÷ 16 × 111 ÷ 37, then the value of k is:

724. Ronak and Riya can do a work in 12 and 18 days, respectively. They worked together for six days and then Ronak left. Find the time taken by Riya to complete the work.

725. Two towns P and Q are 275 km apart. A motorcycle rider starts from P towards Q at 10:00 a.m. at the speed of 25 km/h. Another rider starts from Q towards P at 12 noon on the same day at the speed of 20 km/h. At what time will they cross each other?

726. In a class, there are 60 students. The average weight of the entire class is 42 kg. If there are 36 boys in the class and the average weight of all the boys is 50 kg, then what is the average weight (in kg) of all the girls?

728. Simplify (4 + 4) × (4 ÷ 4) × (4 × 4).

729. A man travels 1200 km by train at 80 km/h, 1600 km by ship at 40 km/h, 1000 km by plane at 400 km/h, and 200 km by car at 50 km/h. What is the average speed for the entire distance? (rounded off to 2 decimal places)

730. If the radius of a sphere is increased by 125%, then by what percentage will its surface area increase (correct to two decimal places)?

Total Quizz:- 10040

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721. A hollow sphere of external and internal diameters of 10 cm and 6 cm, respectively, is melted and made into another solid in the shape of a right circular cone of base diameter 10 cm. Find the height of the cone.

722. Simplify

723. If 855 ÷ 15 − k + 32 × 5 = 1152 ÷ 16 × 111 ÷ 37, then the value of k is:

724. Ronak and Riya can do a work in 12 and 18 days, respectively. They worked together for six days and then Ronak left. Find the time taken by Riya to complete the work.

725. Two towns P and Q are 275 km apart. A motorcycle rider starts from P towards Q at 10:00 a.m. at the speed of 25 km/h. Another rider starts from Q towards P at 12 noon on the same day at the speed of 20 km/h. At what time will they cross each other?

726. In a class, there are 60 students. The average weight of the entire class is 42 kg. If there are 36 boys in the class and the average weight of all the boys is 50 kg, then what is the average weight (in kg) of all the girls?

728. Simplify (4 + 4) × (4 ÷ 4) × (4 × 4).

729. A man travels 1200 km by train at 80 km/h, 1600 km by ship at 40 km/h, 1000 km by plane at 400 km/h, and 200 km by car at 50 km/h. What is the average speed for the entire distance? (rounded off to 2 decimal places)

730. If the radius of a sphere is increased by 125%, then by what percentage will its surface area increase (correct to two decimal places)?

Total Quizz:- 10040

UPSC

English Topic Wise Quizz

Current Affairs Topic Wise Quizz

Hindi Topic Wise Quizz

Important Links

Subjects

Subjects

Exams