47
Q:

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

 A) 56.25% B) 36.25% C) 16.25% D) 12.25%

Explanation:

Let each side of the square be a. Then, area = .$a2$
New side =$125a100=5a4$. New area = $5a42$ = $25a216$

Increase in area = $25a216-a2=9a216$
Increase% = $9a216*1a2*100$ % = 56.25%.

Q:

The lengths of the diagonals of a rhombus are 16 cm and 12 cm. Its area is:

 A) 48 cm2 B) 28 cm2 C) 69 cm2 D) 96 cm2

Explanation:

4 7749
Q:

In a triangle, if the measures of two sides are 5 cm and 8 cm, then the third side can be:

 A) 3 cm B) 14 cm C) 2 cm D) 4 cm

Explanation:

2 3481
Q:

In the given figure, if

 A) 8 cm B) 9 cm C) 11 cm D) 10 cm

Explanation:

2 1227
Q:

In the given figure, $∠APO=35°$ if then which of the following options is correct?

 A) ∠APB = 60° B)  ∠APB = 80° C)  ∠APB = 35° D) ∠APB = 55°

Explanation:

1 6576
Q:

The area of a semicircle is 77 sq.cm. Calculate its perimeter (in cm)

 A) 72 B) 49 C) 98 D) 36

Explanation:

0 4318
Q:

The length of the diagonal and the breadth of a rectangle is 25 cm and 7 cm respectively. Calculate its area (in sq.cm)

 A) 336 B) 168 C) 240 D) 480

Explanation:

0 530
Q:

The area of an equilateral triangle is 18√3 sq.units. Find the value of side (in units) of the triangle.

 A) √2 B) 2√2 C) 3√2 D) 6√2

Explanation:

1 509
Q:

An arc length of 16$π$ units subtends an angle of 240 degrees. Find the radius 9in units) of the circle.

 A) 6 B) 12 C) 24 D) 36