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“Randy can run π meters every 2 seconds. If the circular tra
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Updated on: 24 Apr 2020, 06:09
Updated on: 24 Apr 2020, 06:09
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Question Stats:
70% (01:38) correct
30% (00:52) wrong based on 20 sessions
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Randy can run ππ meters every 2 seconds. If the circular track has a radius of 75 meters, how many seconds does it take Randy to run twice around the track?
A. 150 seconds
B. 300 seconds
C. 600 seconds
D. 1200 seconds
E. 22500 seconds
A. 150 seconds
B. 300 seconds
C. 600 seconds
D. 1200 seconds
E. 22500 seconds
Re: “Randy can run π meters every 2 seconds. If the circular tra
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24 Apr 2020, 01:00
24 Apr 2020, 01:00
I tried solving by dividing 300 pi / 2 and got answer as 150 seconds or 2.5 minutes but it is wrong in Answers, can somebody point out where I went wrong?
Re: “Randy can run π meters every 2 seconds. If the circular tra
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24 Apr 2020, 06:10
24 Apr 2020, 06:10
Expert Reply
Please follow the rules of the board posting a question. The question itself must be posted as it is. That way it is not understandable.
I edited the first post.
Back to the solution
Length of track = 2πr = 2*75*π = 150π m -------- (1)
Speed = π m in 2 secs = π/2 m per sec ------------ (2)
Total distance = 2 * Length of track = 300π ---------- (3)
Time = dist/speed = 300π/(π/2) = 600.
Hence C !!
Regards
I edited the first post.
Back to the solution
Length of track = 2πr = 2*75*π = 150π m -------- (1)
Speed = π m in 2 secs = π/2 m per sec ------------ (2)
Total distance = 2 * Length of track = 300π ---------- (3)
Time = dist/speed = 300π/(π/2) = 600.
Hence C !!
Regards
