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Radha and Hema are neighbours and study in the same school. Both of them use bicycles to go to the school. Radha’s speed is 8 km/hr whereas Hema’s speed is 10 km/hr. Hema takes 9 minutes less than Radha to reach the school. How far is the school from the locality of Radha and Hema?

5 km
5.5 km
6 km
6.5 km

Correct Answer: 6 km

Explanation:

Let the distance between be D km

Time taken by radha – Time taken by Hema = 9 mins

So D/8 – D/10 = 9/60 hrs

D = 6km

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