A lake behind a dam has a capacity of 30000km^2-m approximately. For how many days would this water supply be sufficient to a city of 10^6 populations if daily requirement per person is 500 liters?(a) 60,000 days(b) 950 days(c) 25000 days(d) 8000 daysThis question was addressed to me at a job interview.The question is from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering

A lake behind a dam has a capacity of 30000km^2-m approximately. For h

1.	A lake behind a dam has a capacity of 30000km^2-m approximately. For how many days would this water supply be sufficient to a city of 10^6 populations if daily requirement per person is 500 liters?(a) 60,000 days(b) 950 days(c) 25000 days(d) 8000 daysThis question was addressed to me at a job interview.The question is from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering
Answer» The CORRECT choice is (a) 60,000 DAYS The explanation: Per DAY requirement: 500 X 10^3 liter = 500 X 10^3 m^3 Available WATER in the dam = 30000 X 10^6 m^3 No of days water supplied = 30000 X 10^6/500 X 10^3 = 60000 days.

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