Question

the internal dimension of rectangular hall are 15 metre into 12 into 4 there are four Windows each of dimension to metre into 1.5 metre and two doors each of dimension 1.5 and 2.5 metre find the cost of whitewashing all four walls of the whole of the cost of whitewashing is Rs 5 per metre square what will be the cost of whitewashing if the ceiling of the whole is also white washed​

Answer 1

Answer:

Rs. 1912.5

Step-by-step explanation:

LSA of a cuboid + ceiling = lb+2h(l+b)=15*12+8(15+12)=396m^2

Area of 4 windows= 4(1*1.5)=6m^2

Area of 2 doors=2(1.5*2.5)=7.5m^2

Area to be whitewashed=396-(6+7.5)=382.5m^2.

Cost=5*382.5= Rs .1912.5