A welder received an order to make a 1 million liter cube-shaped tank. If he has only 4x2 meter sheets of metal that can be cut, how many metal sheets will be required for this order? (1 cubic meter = 1,000 liters)
Could you please explain the above RED colored part. What does it mean - "1 million liter cube-shaped "?
The tank is a cube and its volume is 1 million liter.
1 million liter cube-shaped tank = 1,000,000/1,000 = 1,000 cubic meter tank, which means that we have the cube-shaped tank with a side of 10m (10^3=1,000).
Surface area of this tank would be 6 (# of faces of a cube) * 10^2 (area of each face) = 600 m^2.
# of 4*2=8m^2 sheet needed is 600/8=75.