Question

find the cost of carpeting a room 13 m by 9 M with a carpet of width 75cm at the rate of 105 per metre

Answer 1

area of room = 13m × 9m
width= 75 cm or .75m
length of the room= area of room ÷width of room=13×9÷.75 = 156m
so cost of carpet= 156×105= 16380 rupees

Answer 2

L. of the room=13m
B. of the room=9m
area=l*b
       =13*9=117m^2.
let the length of the carpet required be= 'l'm.
and width of carpet = 75cm =0.75m
area of the carpet = area of the room
=l*0.75=117
l=117/0.75
l=156m
therefore length of the carpet required=156m
cost of the carpet/m= rs 105
total cost of the carpet=156*105
                                   =16380
therefore the total cost of the carpet= rs 16380