Question

An open rectangular box has internal dimension 2cm long ,20cm wide and 22.5cm deep if the box is made of wood 2.5
cm thick calculate the volume of wood

Answer 1

Answer:

31500

Step-by-step explanation:

the wood is the difference between the outer and inner volumes. In cm^3, that is

200*20*22.5 - (200-5)(20-5)(22.5-2.5)

Volume of the wood = LBH(Outer)-lbh(Inner)

= 200*20*22.5 - (200-5)(20-5)(22.5-2.5)

= 90,000 - 58,500

= 31500

Answer 2

Answer:

1631.25

Step-by-step explanation:

Volume of wood= Volume of external - Volume of internal

volume of rectangle= l*w*d

volume of internal = 2*20*22.5 = 900

volume of external = (2+2.5) * (20+2.5) * (22.5+2.5) = 2531.25

VOLUME OF WOOD = 2531.25-900

                                     = 1631.25