Question

an open box of length 1.5 m breadth 1 m height 1 m is to be made for use on a trolley for carrying garden wast how much sheet metal will be required to make this box ? the inside and outside surface of the box is to be painted with rust proof paint at a rate of 150 rupees per square meter how much will it cost to paint the box​

Answer 1

Answer:

We have

l= 1.5m,. b=1m,. h=1m

we know

area of cuboid =2(b+l)h+lb [it is open in top]

= 2(1+1.5)1+1.5(1)

= 2(2.5)+1.5

=5+1.5

= 6.5 m^2

hence 6.5 m^2 metal sheet is required to make this box