Question

The length, breadth and height of a rectangular box are 30 m, 25 m and 18.m respectively. Find the cost of painting its outer surface at Rs 12 per m sq

Answer 1

CSA of box = (lb+ bh + hl)
= (30×25+25×18+18×30)
=(750+450+540)
= 1740m^2

Cost of painting = 1740×12 = Rs.17640

Answer 2

I you will understand my answer.