A conical sand pile with a bottom area of 45.9 square meters and a height of 1.2 meters. Use this pile of sand to pave a 3 cm subgrade on a road 12 m wide. How many meters can it be paved?

The volume of sand is 45.9×1.2÷ 3 =18.36 (m3).

3 cm =0.03 m

Then18.36 ÷12 ÷ 0.03 = 51(m)

So you can hit 5 1 meter.

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