Question: The rock from a conical dump is to be used to metal a road to an average depth of 20cm throughout. The road is

The rock from a conical dump is to be used to metal

The rock from a conical dump is to be used to metal a road to an average depth of 20cm throughout. The road is to be 7.0 m wide. If the diameter of the base of the dump is 80.0 m and the angle of repose of the waste rock is 37, calculate the length of road which can be metalled by all the rock from the conical (10) dump. The area of the surface of the water in a reservoir is 10 830 m. During the month 6 366 100 litres of water is run out, the surface area being then 8 360 m. By what amount has the water being lowered? (10)

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