Question

the cost of papering of your of four walls of a room at 75 paise
per square meters is ₹240.the height of the room is 5 meter.find the length and the breadth of the room,if they are in the ratio 5:3​

Answer 1

Answer:

Given, cost of papering the wall is Rs 240 at 75 p per sq. m. Height of the room is 5m and length and breadth are in ratio 5:3.

Areaofwalltobepapered=

costofpaperingpermeter

costofpaperingthewall

=

0.75

240

=320m

2

Height of wall= 5 cm.Let length of wall be 5x and breadth be 3x.

Surface area of four walls=2h(l+b)

320=2×5(5x+3x)

320=10(8x)

320=80x

x=4

Length of wall=5x=5×4=20m.

Breadth of wall=3x=3×4=12m