9. Jaidev takes 2 minutes to walk across the school ground. Rahul takes minutes
to do the same. Who takes less time and by what fraction?
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1
Answer: Rahul takes \frac{9}{20}
Explanation:Time taken by Jaidev = \frac{11}{5}
5
11
minutes
Time taken by Rahul = \frac{7}{4}
4
7
minutes
Difference = \frac{11}{5}-\frac{7}{4}=\frac{\left(11\times4\right)-\left(7\times5\right)}{20}=\frac{44-35}{20}=\frac{9}{20}
5
11
−
4
7
=
20
(11×4)−(7×5)
=
20
44−35
=
20
9
Hence, Rahul takes \frac{9}{20}
20
9
less time than Jaidev.
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