1.

A Is Able To Do A Piece Of Work In 15 Days And B Can Do The Same Work In 20 Days. If They Can Work Together For 4 Days, What Is The Fraction Of Work Left?

Answer»

TOTAL work done by A + B in 1 DAY = 1/15 + 1/(20 ) = 7/60

Work done in 4 days = 7/60 × 4 = 7/15

Therefore, fraction of work left = 1 - 7/15 = 8/15.

Total work done by A + B in 1 day = 1/15 + 1/(20 ) = 7/60

Work done in 4 days = 7/60 × 4 = 7/15

Therefore, fraction of work left = 1 - 7/15 = 8/15.



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