22
Q:

# The area of a circular field is 13.86 hectares. Find the cost of fencing it at the rate of Rs. 4.40 per metre.

 A) 2808 B) 3808 C) 4808 D) 5808

Explanation:

Area = (13.86 x 10000) sq.m = 138600 sq.m

$πR2=138600⇒R2=138600×722⇒R=210m$

Circumference = $2πR2=2×227×210=1320m$

Cost of fencing = Rs. (1320 x 4.40) = Rs. 5808.

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 7605
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:

1 3392
Q:

In the given figure, if

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

Explanation:

2 1204
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 6477
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 4197
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:

0 517
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:

1 506
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