Question

The length of the floor of room is two times its breadth and the perimeter of the floor is 48 m. Find the cost of paving marbles on the floor at Rs 125 per sq. metre. ​

Answer 1

16,000

Explanation:

The width is w and the length is 2w

Perimeter = w + w + 2w + 2w

48 =6w Divide both sides by 6

w = 8 Since the length is twice as long, it is 16

area = length times width

area = 16 x 8 = 128

The area of the floor is 128
`m^(2)`

It cost 125 per square foot

128 x 125 = 16,000