Question

A and B can finish a piece of work in 6 days and 10 days respectively. A began the work and worked at it for 2 days he was joined by b .find the total time taken to complete the work.

Answer 1

let the work be x
work done by a in 1 day=x/6
work done by b in1 day =x/10
work done by a in two day =2x/6
work done by a and b in one day= x/6+x/10
=8x/30
work left=x-2x/6
=4x/6
time taken by a and b both
4x/6 ÷8x/30
2.5 days
total time =2.5+2
=4.5 days

Answer 2

Answer:

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