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Question

P, Q and R can do a work in 12, 24 and 32 days respectively. They all begin together. P continues to work till it is finished. R left after 4 days and Q one and half day before its completion. In what time is the work finished?



A

10.5 days

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B

7.5 days

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C

152 days

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D

12 days

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Solution

The correct options are
B

7.5 days


C

152 days


Assume the work is done in ‘x’ days.

Work done by P + work done by Q + work done by R = 1

x12+x1.524+432=1

  x=7.5


Mathematics

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