Speed, Time & Distance Questions: A boy running at a speed of 5 m/sec, will take | HelloExamz

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A boy running at a speed of 5 m/sec, will take how much time to complete a round running around the circumference of...

A boy running at a speed of 5 m/sec, will take how much time to complete a round running around the circumference of the circular track of radius 2240 metres ?

A

None of these

B

2456 sec

C

2/3 hour

D

43 minutes

E

2816 sec

A

None of these

B

2456 sec

C

2/3 hour

D

43 minutes

E

2816 sec

Solution

Speed of the boy = 5 m/secRadius of circular track = R = 2240 mCircumference of circular track = 2πR = 2 ×...

Speed of the boy = 5 m/sec
Radius of circular track = R = 2240 m
Circumference of circular track = 2πR
= 2 × (22/7) × 2240 = 14080 m
Time taken to complete one round = 14080/5 = 2816 sec

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