Question

Find the cost of whitewashing the four walls of a
rechangular barn, whose dimensions are 30 cm X 20 cm X 15
cm at the rate of Rs. 2,10 per square meter​

Answer 1

Answer:

Rectangular barn is a cuboid

So Curved surface area of a cuboid =2(l+b)h

2*l+b*h

2*30+20*15

60+40*15

100*15=1,500cm

Converting 1500cm into m

=1500 divided by 100=15m

Cost of White washing =15*Rs.210

Rs-3150