Question

A room is 13 m long and 7 m broad. Find the cost of carpeting the room with a carpet 75 cm broad at Rs.8.50 per metre.
(A) 453.33
(B) 1031.33
(C) 403 (D) none of these

Answer 1

Length of room (l) = 13 m
Breadth of room (b)= 9 m

Breadth of carpet= 75 cm = 75/100= .75 m

[ 1 cm = 1/100]

Area of room = length × breadth

Area of room = 13×9 = 117 m²

Let Length of required carpet be x m 

Area of carpet = x × .75= .75x m²

Area of carpet = area of room

.75x = 117

x = 117 /.75 = 11700/75= 156

Length of carpet = 156 m

Cost of carpeting 1 m = ₹ 65

Cost of carpeting 156 m = 156 × 65 = ₹ 10140

Hence, the cost of carpeting = ₹10140