Question (47/50)
A, B and C can complete a piece of work in 24, 6 and 12 days respectively. If they work together, how many days do they need to complete same work ?(A) 1/24
(B) 7/24
(C) 24/7
(D) 4
Question (48/50)
A tyre has two punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second puncture alone would have done it in 6 minutes. If air leaks out of a constant rate, how long does it take both punctures together to make tyre flat ?(A) 1.5 Minutes
(B) 3.5 Minutes
(C) 3.6 Minutes
(D) 4.4 Minutes