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A boy runs at the speed of 10 km/hr. How many minutes will he take
to cover 650 metres?
Answers
Step-by-step explanation:
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Given data : A boy runs at the speed of 10 km/hr.
To find : How many minutes will he take to cover 650 metres ?
Solution :
According to given, let, boy run at constant speed 10 km/hr.
Now, we need to convert, speed of the boy into m/s.
→ 10 km/hr = {10 * 1000}/{1 * 60 * 60}
→ 10 km/hr = 10000/3600
→ 10 km/hr = 25/9 m/s
Now, we use formula of speed,
→ speed = distance/time
→ 25/9 = 650/time
→ 25 = ( 650 * 9 ) /time
→ 25 = 5850/time i.e.
→ time = 5850/25
→ time = 234 sec
Now, we need to convert 234 sec into minutes,
→ 234 sec = 234/60
→ 234 sec = 39/10
→ 234 sec = 3.9 minute
ANSWER : Hence, 3.9 minutes taken by boy to cover 650 metre.
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