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A lake behind a dam has a capacity of 30000km2-m approximately. For how many days would this water supply be sufficient to a city of 106 populations if daily requirement per person is 500 liters?

A lake behind a dam has a capacity of 30000km2-m approximately. For how many days would this water supply be sufficient to a city of 106 populations if daily requirement per person is 500 liters? Correct Answer 60,000 days

Per day requirement: 500 X 103 liter = 500 X 103 m3 Available water in the dam = 30000 X 106 m3 No of days water supplied = 30000 X 106/500 X 103 = 60000 days.

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