Determine the time taken when the distance is 720 km and the speed is 60km/hr 2.A cyclist covers 990m in 5 minutes. find his speed in km/hr. 3. A man runs at the speed of 10km/hr. how much time will he take to cover 787 metres? 4.Aaron ran 2000 metres in 190 seconds. Find the speed in km per hour.
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Answers
Given :-
(1) Distance = 720 km
Speed = 60 km/h
(2) Distance = 960 m
Time = 5 min
(3) Speed = 10 km/h
Distance = 750
(4) Distance = 500 m
Time = 100 sec
To Find :-
(1) Time
(2) Speed in km/h
(3) Time
(4) Speed in km/h
Solution :-
(1)
Time = Distance/Speed
Time = 720/60
Time = 72/6
Time = 12 hours
(2)
Distance in km = 960/1000 = 96/100 km
Time in hours = 5/60 = 1/12 hours
Now
Speed = Distance/Time
Speed = (96/100)/(1/12)
Speed = 96/100 × 12/1
Speed = 11.52 km/h
(3)
1 km = 1000 m
750 m = 750/1000 = 0.75 km
Time = Distance/Speed
Time = 0.75/10
Time = 75/1000
Time = 0.075 hours
1 hours = 3600 sec
Time (in sec) = 0.075 × 3600
Time (in sec) = 270 sec
(4)
Speed in (m/s) = 500/100
Speed in (m/s) = 5 m/s
Now
5/18 m/s = 1 km/h
18/5 × 5 km/h
18 km/h
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