If the length and the width of a rectangle are both tripled, the ratio of the area of the original rectangle to the area of the enlarge rectangle is
1:5
1:7
1:9
9:1
If the radius of a circle is decreased by 10% by what per cent is its area decreased?
15
19
42
89
A closed rectangular box with a square base is 5 cm in height. If the volume of the box is 45 cubic cm, what is the box's surface area in square cm?
54
72
78
92
A figure is given belowradius OA=3 cm. Calculate the area of the shaped region.
The area of a rectangle with width 3 cm and length 8 cm is equal to the area of a triangle with base 6 cm and height of-
5 cm
8 cm
11 cm
18 cm
What is the area of the rectangle in sq. units in the figure?
8
12
14
21
Three congruent squares are arranged in a row., If the perimeter of ABCD is 80 cm, the area of ABCD is-
280 cm2
312 cm2
540 cm2
300 cm2
If each of the dimensions of a rectangle is increased 100%, the area is increased:
150%
200%
300%
500%
If cylinder A has a height twice that of cylinder B and a radius half that of cylinder B, what is the ratio between the volume of cylinder A and the volume of cylinder B?
1:6
2:1
1:2
4:1
The length of a rectangle with area 12 cm2 is three times the rectangle's width. What is the perimeter of the rectangle?
15 cm
16 cm
