A car travelling at a speed of 70km/h covers a certain distance in 5 hours . If its speed is reduced by 14 km /h , how long will it take to cover the same distance ?
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The car travels for 5 hrs at 70km/hr
So as three formula says
Speed = distance / time
So the car travels 70 × 5 = 350km
If speed is reduced by 14 km/hr
Speed of car now = 70 - 14 = 56 km/hr
So to travel 350 km at 56 km/hr implies
Time = distance / speed
So time taken in hrs ( as all values are in hrs )
Time taken is 6.25 hrs
In min we must multiply 60 as 1 hr = 60 min
Hence
375 min is the answer. i.e 6hrs 15 min
So as three formula says
Speed = distance / time
So the car travels 70 × 5 = 350km
If speed is reduced by 14 km/hr
Speed of car now = 70 - 14 = 56 km/hr
So to travel 350 km at 56 km/hr implies
Time = distance / speed
So time taken in hrs ( as all values are in hrs )
Time taken is 6.25 hrs
In min we must multiply 60 as 1 hr = 60 min
Hence
375 min is the answer. i.e 6hrs 15 min
Xosmos:
Hope it helps.
If any doubt feel free to ask
No in my book ans is 6 hours 15 min
Yes 6hrs 15 min is nothing but 6.25 hrs
Convert both to one unit
You would get 375 min in both cases
Hope you got it
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