Question

a room is 13m long and 9m broad.find the cost of carpeting the room with a carpet 75cm broad at the rate of rupees 16.50 per metre.

Answer 1

Length of open plastic box =l=1.5 m

Breadth of open plastic box =b=1.25 m

Height of open plastic box =h=65 cm

Converting into meter

=65/100= 0.65 m

The area of the sheet required for making the open plastic box =lb+2bh+2hl

(Because it is open from the top)

=(1.5)(1.25)+2(1.25)(0.65)+2(0.65)(1.5)=1.875+1.625+1.95=5.45 m2

Cost of one sheet of 1 m2 = Rs 20

Cost of 5.45 m2 =20 X 5.45=Rs 109