Management Aptitude Test Dec 2012 Paper

Question : 84 of 200

Marks: +1, -0

A can do a piece of work in 7 days of 9 h each whereas B can do the same work in 6 days of 7 h each. How long will they take to do the work together, working 8

2/5

h a day?

2 days
3 days
3 $1/7$ days
4 $2/5$ days

Validate

Solution:

(b) Time taken by A to complete the work = 7 x 9 = 63 h
Time taken by B to complete the work = 6 x 7 = 42 h
Time taken by A and B together to complete the work =

1/{1/63+1/42}

{21×3×2}/{3+2} = 126/5

h
But if A and B work for 8

2/5

h daily, then number of days taken by them =

126/5+42/5

126/42

= 3

Go to Question:

Prev Question

Next Question