contains 30 litres of water. It drains out through a small opening at the bottom. 10 litres of water comes out in time t1
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A cylindrical drum, open at the top, contains 30 litres of water. It drains out through a small opening at the bottom. 10 litres of water comes out in time t1, the next 10 litres in a further time t1 and the last 10 litres in a further time t3 Then, A cylindrical drum contains [...]