a person travelled by car for 4 days . he drove 10 hours each day. he drove first day at the rate of 45 kmph, second day at the rate of 40 kmph, third day at the rate of 38 kmph and the fourth day at the rate of 37 kmph. what is the average speed?
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Answer:
Speed of car in first 15 minutes = 40 km/h
Distance covered = speed × Time taken
60 minutes = 1 hour
15 minutes =
60
15
hour
Distance covered = 240×
60
15
=10km
Speed of car in next 15 minutes = 60 km/h
Distance covered = 60×
60
15
=15km
∴ Total distance covered = (10+15)km = 25 km
∴ 25 km is correct
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