A journey by car takes 48 minutes at 65 kmph. How fast must the car go to finish the journey in 40 minutes?
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Step-by-step explanation:
65*40/48 = your answer
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It is given that at a speed of 65 km/hr the car completes its journey in 48 minutes.
We will first convert the time into hour
60 minute = 1 hour
48 minutes = 48 / 60 hour
= 0.8 hour
We will use this data to find the distance
Speed = distance / time
65 = distance / 0.8
distance = 65 × 0.8
= 52 km
Now, we have to find the speed if the journey is to be completed in 40 minutes
40 minutes = 0.67 hour
Speed = distance / time
= 52 / 0.67
= 77.61 km/hr
Hence, the speed has to be 77.61 km/hr in order to complete the journey in 40 minutes
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