Question

a central hall of a school is 18m long and 12.5m widw. a carpet is to be laid on the floor leaving a width of 50 cm from the walls. find the area of rhe floor left uncarpeted.​

Answer 1

Answer:

Sol: Length of the room = 13 m Breadth of the room = 9 m Area of the room = l × b = 13 × 9 = 117 m2 Let the length of the carpet required = 'l' m Width of the carpet = 75 cm = 0.75 m Area of the carpet = Area of the room ⇒ l × 0.75 = 117 ⇒ l = 117 / 0.75 ⇒ l = 156 m Length of the carpet required = 156 m Cost of the carpet per metre = Rs 105 Total cost of the carpet = 156 × 105 = Rs 16380.