A tyre has two punctures. The first puncture alone would have made the tyre flat in 12 minutes and the second alone would have done it in 8 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat ?  Options:
A) 4 4/5min
B) 3 2/5min
C) 3 3/5min
D) 3 4/5min
E) 3 min
Explanation:   Do not be confused, Take this question same as that of work done question's. Like work done by 1st puncture in 1 minute and by second in 1 minute.   Lets Solve it:   1 minute work done by both the punctures =   (1/12+1/8)=(5/24)   So both punctures will make the type flat in   (24/5)mins=4 4/5mins   Option 4 4/5min
<result>A</result>
A tyre has two punctures. The first puncture alone would have made the tyre flat in 12 minutes and the second alone would have done it in 8 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat ?