Question
'Pooja' can complete a work in 28 days. She started the
work and left after 14 days from starting. The remaining work was done by 'Ritika' in 21 days. Find the time taken by 'Ritika' to complete 50% of the work.Solution
ATQ,
Fraction of work completed by 'Pooja' = (14/28) = (1/2)
Remaining work = 1 - (1/2) = (1/2)
Time taken by 'Ritika' to complete (1/2)th of the work = 21 days
Time taken by 'Ritika' to complete the whole work = 21 × (2/1) = 42 days
Therefore, time taken by 'Ritika' to complete 50% of the work = 0.5 × 42 = 21 days
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