Time and Work

P and Q can complete a j ob i n 30 days and 20 days respectively. If P started the work first and 15 days later, Q joined, in how many days will they complete the remaining work?
A. 6 days
B. 12 days
C. 18 days
D. 21 days

See our previous ‘Questions of the Day’:
Quant Question Of The Day: 272
Quant Question Of The Day: 271


  1. Let total work = 60 units (LCM of 30 and 20)
    One day work of P=2
    One day work of Q=3
    Work done by P in 15 days = 30
    Remaining work = 30
    One day work of P and Q = 5 units
    Days to complete remaining work = 6

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