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- A tyre has two punctures.
Question 1:
A tyre has two 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. 3(1/5)min
B. 3(2/5)min
C. 3(3/5)min
Feedback 1 minute work done by both the punctures =(1/9+1/6)=(5/18)
So both punctures will make the type flat in (18/5)mins=3(3/5)mins
So both punctures will make the type flat in (18/5)mins=3(3/5)mins
D. 3(4/5)min
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