Question

17. A room is 17m long and 12m broad. Find the cost of
carpeting the room with a carpet 85 cm broad at the rate
of Rs.120 per meter.​

Answer 1

SOLUTION

• Area of rectangular room=17×12=204m^2

• breadth of rectangular carpet=85cm=85/100m [1cm=1/100metres]

• Area of rectangular room=area of rectangular carpet=85/100×length=204

• length of rectangular carpet=204×100/85=12×20=240m

• perimeter of rectangular carpet=2(length+breadth)=2(0.85+240)=2×240.85=481.7m

• cost of per metre=120rs

• cost of 481.7metre=481.7×120=57804rs