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# Q.9 Jaidev takes$$2\frac{1}{5}$$ minutes to walk across the school ground. Rahul takes$$\frac{7}{4}$$ minutes to do the same. Who takes less time and by what fraction?

Time taken by Jaidev to walk across the school ground =$$2\frac{1}{5}$$ = $$\frac{11}{5}$$ minutes
Time taken by Rahul to walk across the school ground = $$\frac{7}{4}$$ minutes
$$\frac{11}{5}$$ and $$\frac{7}{4}$$
By cross multiplication
11×4 and 5×7
44 > 35
$$\frac{11}{5}$$ > $$\frac{7}{4}$$
$$\therefore$$ Rahul takes less time than Jaidev to walk across the school ground
Difference = $$\frac{11}{5}$$ - $$\frac{7}{4}$$
= $$\frac{11×4}{5×4}$$ - $$\frac{7×5}{4×5}$$
= $$\frac{44}{20}$$ - $$\frac{35}{20}$$
= $$\frac{9}{20}$$