Question

The cost of painting 4 walls of a room is Rs6300 at the rate of Rs35/sqm. If the room is 10m long and 8m wide,
what is its height ?​

Answer 1

The cost of painting the 4 walls = 6300 at the rate of ₹35/sqm

ATQ,

The room is 10m long , 8m wide and h= ?m

The LSA of the cuboidal room = The cost of painting the walls / the cost of painting the wall per sqm

= 6300/35

=180sqm

The LSA of the cuboidal room = 180sqm

The LSA of the cuboidal room =2h(l+b)

180sqm = 2h(10+8)

180sqm =2h(18)

2h=180/18

2h=10

h=10/2

h=5m