When speed is tripled, the time taken to complete the same distance, which took one hour earlier is ____
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Answer: 3 hours or 20 min.
Step-by-step explanation:
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speed = distance/time
speed,s is inversely proportional to time,t
s1t1 = s2t2
given s2 =3s1
s1t1 = 3s1t2
t1 =3t2
t1 = 1hr =60mins
t2 = 1/3 *60 =20 mins
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