Time and Work Practice Test 4 with solutions

Question : 21 of 40

Marks: +1, -0

Carpenter A can make a chair in 6 hours, carpenter B in 7 hours and carpenter C in 8 hours. If each carpenter works for 8 hours per day, how many chairs will be made in 21 days?

Validate

Solution:

Carpenter (A + B + C)'s 8 hours' work =

8/6 + 8/7 + 8/8

4/3 + 8/7 + 1

{73}/{21}

chairs.
Hence, in 21 days when they work 8 hours per day, the number of chairs will be made
=

{73}/{21} × 21

= 73 chairs.

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