551.
Rahul spends 70% of his income. His income increased by 15% and his expenditure increased by 7.5%. What is the
percentage increase in his savings?
(A)
(B)
(C)
(D)
552.
In ∆ABC, P and Q are the middle points of the sides AB and AC, respectively. R is a point on the segment PQ such that PR:
RQ = 1:5. If PR= 6 cm, then BC = ____.
(A)
70 cm
(B)
66 cm
(C)
68 cm
(D)
72 cm
553.
The radius of a sphere is increased by 25%. What is the increase per cent in surface area?
(A)
56.25%
(B)
36.45%
(C)
25.25%
(D)
15.55%
554.
In the given figure, O is the centre of the circle, AE is the diameter and ∠AOC = 100°.
The value of ∠CDE + ∠CEA is:
(A)
90°
(B)
80°
(C)
60°
(D)
100°
555.
If the diameter of the base and curved surfaced area of a cylinder are 14cm and 352 cm2,respectively, then the total surface
area of the cylinder is equal to:
(A)
660 cm2
(B)
760 cm2
(C)
754 cm2
(D)
654 cm2
556.
A box filled with gift articles weighs 25 kg. If the weight of the box and the gift articles, respectively, are in the ratio 1 : 9,
then the weight of the articles (in grams) is:
(A)
21500
(B)
22500
(C)
24500
(D)
23500
557.
Convert 28% into the form of ratio.
(A)
25 : 7
(B)
18 : 7
(C)
7 : 25
(D)
7 : 18
558.
If 70% of the cost price of an article is equal to 40% of its selling price, what is the profit percentage?
(A)
85%
(B)
80%
(C)
70%
(D)
75%
559.
Three solid cubes of metal have sides 6 cm, 8 cm and 10 cm, respectively. They are melted to form a new cube. What is the
surface area of this new cube?
(A)
(B)
(C)
(D)
560.
Shankar covers a certain distance by a car driving at 40 km/h and he returns to the starting point riding on a scooter with a
speed of 20 km/h. Find the average speed of the whole journey.
