1541.
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%
1542.
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°
1543.
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
1544.
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
1545.
Convert 28% into the form of ratio.
(A)
25 : 7
(B)
18 : 7
(C)
7 : 25
(D)
7 : 18
1546.
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%
1547.
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)
1548.
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.
(A)
(B)
(C)
(D)
1549.
Which of the following numbers is divisible by 22?
(A)
893002
(B)
645372
(C)
602351
(D)
654320
1550.
In the year 2000, Monu was 3 times his sister’s age. In 2010, he was 24 years older than her. Find Monu’s age in 2010.
