there are 2 hour glass. one is 13min hour glass. another is
8min hour glass. u need to stop a button exactl aftr
18min..how do u calculate when 18min is passed?
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Answer Posted / deepak
Now start both the hour glasses after 8 min 2nd hour glass
will be empty(8min passed) and 1st hour glass have 5 min
left now invert the 2nd hour glass and let pass the
remaining 5 min left in 1st glass(8+5=13min passed)and at
the same time compare it with 2nd glass now we know with
passing of 5 min in first glass there is 3 min left in 2nd
glass because we have inverted and 5 min left in down
portion now again invert the 2nd glass then the 5 min will
pass so 8+5+5=18min.Thanks.
| Is This Answer Correct ? | 27 Yes | 5 No |
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