Right circular cylinder P has a radius of 3 cm and a height of 4 cm. If the volume of P is equal to the volume of right circular cylinder Q, which has a radius of 2 cm, what is the height of Q?
7 cm
9 cm
17 cm
24 cm
A piece of wire is shaped to enclose a square, whose area is 121 square cm. It is then reshaped to enclose a rectangle whose length is 13 cm. The area of the rectangle, (in square cm) is-
81 cm2
95 cm2
117 cm2
178 cm2
The length of a rectangle with area 12 cm2 is three times the rectangle's width. What is the perimeter of the rectangle?
8 cm
11 cm
15 cm
16 cm
A figure is given belowradius OA=3 cm. Calculate the area of the shaped region.
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
What is the area of the rectangle in sq. units in the figure?
8
12
14
21
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 area of a square of side x cm is 5 cm2, what is the area of a square of side 3x cm?
25 cm2
45 cm2
105 cm2
If the radius of a circle is decreased by 10% by what per cent is its area decreased?
15
19
42
89
If each of the dimensions of a rectangle is increased 100%, the area is increased:
150%
200%
300%
500%
