Question 36

Rizvan walks at 15 km/hr and Ruchitha cycles at 20 km/hr towards each other. What was the distance between them when they started if they meet after 42 minutes?

Solution

Speed of Rizvan = 15 km/hr and Ruchitha = 20 km/hr

Since they are moving in opposite direction, => Relative speed = 20 + 15 = 35 km/hr

Let distance between them = $$d$$ km and time = $$\frac{42}{60}$$ hr

=> time = distance/speed

=> $$\frac{d}{35} = \frac{42}{60}$$

=> $$d = \frac{42}{60} \times 35 = \frac{7 \times 7}{2}$$

=> $$d = \frac{49}{2} = 24.5$$ km

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