31.
Two candles have different lengths and thickness. The
shorter lasts 11 hours and the longer 7 hours when both are
lit simultaneously. If after 3 hours of their being lit together
at the same time, both have the same length, then the ratio
of their original lengths is
INTSE 2011]
(1) 5:8
(2) 11:14
(3) 10:13
(4) 7:11
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