Question

The volume of a rectangular room of height 5m is 2000m³. How much does it cost for plastering on the floor at the rate of Rs. 5 per metre square?​

Answer 1

Answer: Rs. 2000

Explanation:

Given that: height of room= 5m

volume of room= 2000m³

cost of plastering per metre square= Rs. 4

To find: cost of platering on the floor

Solution:

volume of room = 2000m³

l×b×h = 2000m³

l×b × 5 = 2000m³

l×b = 2000/5

l×b = 400
`m^(2)`

area of floor = 400
`m^(2)`

cost of plastering on the floor= area of floor × cost per m square

= 400
`m^(2)` × 5

cost of plastering on the floor = Rs. 2000