TCS 2011 Placement Paper

(1/2) of a number is 3 more than the (1/6) of the same number?a) 6b) 7c) 8d) 92.

 

There are two water tanks A and B, A is much smaller than B. While water fills at therate of 1 liter every hour in A, it gets filled up like, 10, 20, 40,80, 160..in tank B. (At theend of first hour, B has 10 liters, second hour it has 20 liters and so on). If tank B is 1/32filled of the 21 hours, what is total duration of hours required to fill it completely?
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