16) There are two water tanks A and B, A is much smaller
than B. While water fills at the rate of one litre every
hour in A, it gets filled up like 10, 20, 40, 80, 160... in
tank B. (At the end of first hour, B has 10 litres , second
hour it has 20, and so on). If tank B is 1/32 filled after
21 hours, what is the total duration required to fill it
completely?
a) 26 hrs b) 25 hrs c) 5 hrs d) 27 hrs
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Answer Posted / sumit kumar
10+20+40+80+160....
10(1+2+4+8+16..............)
this is a gp
first term=a
ratio=2
t21=1*2^20
given*******
1/32 of x=2^20
x=2^25
therefore in gp
Tn=ar^n-1
n-1=25
n=26
=26
| Is This Answer Correct ? | 141 Yes | 17 No |
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