Lalit finished a piece of work in 7/12 hour and Lata did the same work in
3/4 hours . Who worked longer and by what fraction was it longer?
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Lalit finished a piece of work in = 7/12 hours
Lata finished the same work = 3/4 hours
who work longer = ?
3 / 4 - 7/ 12
l.c.m is = 12
9 - 7 / 12
= 2/12
Lata work longer
by 2/ 12 hours
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