7. A Swinaming poble long . A boy can swim across the length of the pool and then return to the starting 8 minutes what is this spead in Km/hr
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Step-by-step explanation:
Length of a swimming pool =50 m
A boy crosses it and then come back
Total distance covered =50×2=100 m
Time taken =5 minutes
∴Speed in km/h=
T
D
=
1000×5
100×60
=1
5
1
km/h=1.2 km/h
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