a car travels a certain distance in 30mins with average speed of 60km /hr. what will be the speed of car to cover same distance in 20 mins.
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2
Answer:
90km/hr
Step-by-step explanation:
Speed = distance / time
1st case
60km/hr = distance / 0.5hr
(as speed is in hr convert distance to hrs 30min/60 = 0.5 hrs )
=> 60 * 0.5 = distance
=> distance = 30 km
2nd case
speed = d/t
Speed = 30km / 0.3333
( converstion to hrs 20min / 60 = 0.3333 )
=> Speed = 90km/hr
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