Priti drives at an average speed of 80 kilometre per hour and reaches the post office from her house in 6 minutes. On her way back, priti reaches her house in 4 minutes 48 seconds. Find the distance between priti house and the post office and also pritti average speed on the return journey
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Answer:
8 km
100 km/hr
Step-by-step explanation:
Priti drives at an average speed of 80 kilometre per hour and reaches the post office from her house in 6 minutes. On her way back, priti reaches her house in 4 minutes 48 seconds
Priti average Speed = 80 km/hr
Time = 6 minutes = 6/60 = 1/10 hr
Distance = Speed * Time
=> Distance = 80 * 1/10 = 8 km
on return
Distance = 8 km
Time = 4 minutes 48 secs = 288 secs = 288/3600 hr
Average Speed = 8 /(288/3600) = 3600/36 = 100 km/hr
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