Question

The cost of carpeting a room 15 m long with a carpet 75 cm wide , at Rs. 70 per metre , is Rs. 8400 .The width of the room is
A. 9m
B. 8m
C. 6m
D. 12m

Answer 1

Correct Answer - C
Length of the carpet =`("total cost")/(" rate per m")=((8400)/(70))m= 120 m.`
Area of the room = Area of the carpet `=(120xx(3)/(4))m^(2)= 90m^(2).`
Width of the room `=("area")/("length")=((90)/(15))m=6m.`