The cost of carpeting a room 15 m long with a carpet Rs. 75 cm wide, at Rs.70 per metre, is Rs. 8400.The width of the room is
(a) 9 m (b) 8 m (c) 6 m (d) 12 m
The cost of carpeting a room 15 m long with a carpet of width 75 cm at Rs. 80 per metre is Rs.19200. Find the width of the room.