The distance between Shaurya’s house and Pratyusha’s house is 18 km. Shaurya’s speed is 3/7th of that Pratyusha. Shaurya takes one hour in going to Pratyusha’s house. What is the speed of Pratyusha ?
Shaurya's speed = $$\frac{18}{1}$$ = 18 kmph
=> Speed of Pratyusha = $$18 \times \frac{7}{3}$$
= 42 kmph
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