818
Q:

# If each side of a square is increased by 25%, find the percentage change in its area?

 A) 65.25 B) 56.25 C) 65 D) 56

Explanation:

let each side of the square be a , then area = $a2$

As given that The side is increased by 25%, then

New side = 125a/100 = 5a/4

New area = $5a42$

Increased area= $25a216-a2$

Increase %=$9a2/16a2*100$  % = 56.25%

Q:

The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).

 A) 60 B) 120 C) 37 D) 74

Explanation:

0 52
Q:

Find the area (in sq units) enclosed by y = 0, x+6=0 and 2x-3y=6.

 A) 9 B) 16 C) 20 D) 27

Explanation:

0 41
Q:

In ΔXYZ measure of angle Y is 90°. If cosecX = 17/15, and XY = 4cm, then what is the length (in cm) of side YZ?

 A) 7.5 B) 8.5 C) 5 D) 6

Explanation:

0 49
Q:

Find the area (in cm²) of a semi-circle of radius 35 cm.

 A) 3850 B) 960 C) 1920 D) 1925

Explanation:

0 38
Q:

The lengths of the two diagonals of a rhombus are 8 cm and 15 cm respectively. Find its area (in cm²).

 A) 30 B) 120 C) 90 D) 60

Explanation:

0 32
Q:

Two equal circles intersect each other at point A and B, whose centers are O and O’. OO’ = 24 mm and AB = 10 mm, then find the area (in sq. mm) of the circle.

 A) 530.66 B) 520.66 C) 510.33 D) 500.33

Explanation:

0 30
Q:

The length of the diagonal of a square is 12 cm. Find its area (in cm2).

 A) 36 B) 72 C) 144 D) 48

Explanation:

0 73
Q:

The length and breadth of a rectangle are 21 cm and 20 cm respectively. Find its area (in cm2).

 A) 420 B) 840 C) 80 D) 160