11.
The ratio of the speed of a boat to that of the current water is 35 : 8. The boat goes along with the current in 5 hours 10 minutes. What will be the time taken by the boat to come back?
(A)
5 hours 15 minutes 58 seconds
(B)
6 hours 45 minutes 10 seconds
(C)
8 hours 13 minutes 48 seconds
(D)
9 hours 30 minutes 49 seconds
12.
Sumit and Rajiv, working together, can do a job in 20 hours whereasSumit alone can do the same job in 25 hours. In how many hours can Rajiv alone do the job?
(A)
70
(B)
90
(C)
80
(D)
100
13.
Two trains, P and Q, are running on parallel tracks in opposite directions with lengths of 110 m and 140 m, respectively. Train P is running at a speed of 70 km/h and took 5 seconds to cross train Q. The speed of train Q is:
(A)
120 km/h
(B)
110 km/h
(C)
90 km/h
(D)
100 km/h
14.
A shopkeeper sold 3 wristwatches for ₹2,800 each. If he has sold the watches with 40%, 25% and 12% profit, respectively, then find his overall profit percentage (correct to 2 decimal places).
(A)
0.2419
(B)
0.2463
(C)
0.2455
(D)
0.2475
15.
A man travels some distance from his house to the exhibition ground by an auto at a speed of 30 km/h and returns by a cab at a speed of 50 km/h. What is his average speed (in km/h)?
(A)
38
(B)
28
(C)
40
(D)
37.5
16.
If the length and breadth of a cuboid are increased by 6% and 8%, respectively, then the percentage increase in its volume (correct to two decimal places) is:
(A)
13.96%
(B)
12.96%
(C)
14.48%
(D)
11.48%
17.
The side PR of a ΔPQR is extended to S such that QR = RS. If ∠PRQ = 86°, then find the value of ∠PSQ.
(A)
94°
(B)
54°
(C)
43°
(D)
86°
18.
The population of a town is 15000. If the population increases by 15% in the first year, by 25% in the second year and due to pollution it decreases by 6% in the third year, what will be its population after 3 years?(Round off number in answer)
