IBM Company Numerical Ability Time and Work

A tyre has punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?
A. 1x1/2 minutes B. 3x1/2 minutes
C. 3x3/5 minutes D. 4x1/4 minutes

Read Solution (Total 2)

Ans is C) 3 3/5 mins
12 years agoHelpfull: Yes(4) No(1)

1/9 + 1/6= 5/18
9 years agoHelpfull: Yes(0) No(0)

IBM Other Question

Four skilled workers do a job in 5 days, and five semi-skilled workers do the same job in 6 days. How many days will it take for two skilled and one semi-skilled worker to do that job? 10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
A. 1 B. 3
C. 5 D. 7