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in Aptitude by (79.8k points)

A, B and C can complete a piece of work in 10, 12 and 15 days respectively. A left the work 5 days before the Work was completed and B left 2 days after A had left number of days required to complete the whole work was: 

(a) 26/3 days 

(b) 6 days 

(c) 20/3 days 

(d) 7 days

1 Answer

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Best answer

Correct option (d) 7 days

Explanation: 

A leave the work 5 days before completion and B after 2 days when A 

leave. S Do C work alone for the last three days. C = 4×3=12 unit

Before it (B+C) work for 2 days = 9×2=18 unit

Remaining = (60-30) unit done by (A+B+C)

No. Of days taken by them (A+B+C)

30/15 (6 +5 +4 ) = 2 days

Total days = 3+2+2= 7 days.

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