Question

If both burners are opened simultaneously such that
the first is opened to 90% of its capacity and the
second is opened to 80% of its capacity, the amount
of time in which the gas cylinder will be empty (if
it was half full at the start) will be:
(a) 250 minutes (b) 400 minutes
(c) 200 minutes (d) None of these
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Answer 1

Answer:

The Answer is (B)

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