Question

A room of dimensions 5.2m x 4.1m x 2.5m is to
be plastered excluding the floor. Find the cost
of plastering of the rate of $25 per square metres​

Answer 1

Explanation:

Total surface area of the room= 2(lb+bh+hl)

= 2(5.2 ×4.1+4.1×2.5 +2.5 ×5.2)

= 2×30.53= 61.06 Sq. M

Cost of plastering 1 Sq. M =₹25

Cost of plastering 61.06 Sq. m =61.06×25

= ₹1526.5 ans...