Question

the cost of papering four walls of a room at rupees 1.80 per square metre is rupees 405 the height of the room is 5 metres find the length and breadth of the room if they are in the ratio 4:1

Answer 1

breath = height

4:1 = 4x5 : 1x5

= 20m and 5m

or

area = 405 / 1.80

=area / 4: 1

= perimeter