Find the average speed, if a cyclist travels,
(1) 6 km/h for 25 minutes and 8 km/h for
15 minutes.
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Step-by-step explanation:
25 min = 25/60 h=
case1.
distance = speed x time
= 6 x 25/ 60
= 25/10
= 2.5 km
case2.
15 min = 15/60 h
distance = speed × time
= 8 x 15/60
= 2x 15/15
= 2 km
Now
avg speed = total distance/ total time
= 2 + 2.5/ 25/60 +15/60
= 4.5/ 40/60
= 4.5/.6
= 7.5 km/h
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