moving at the rate of 70 km per hour a car completes a journey in 18 minutes how long would it take to complete this journey with speed is increased 84 km per hour
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speed = 70km/h
so, in 1 hour the car can cover 70 km.
so,in 1 minute it can cover 7/6 km.
so,in 18 minuted it can cover 21 km.
now,speed = 84 km/h
d/t = 84
21 /t = 84
t = 21/84 hours.
= 210/14 = 105/7 minutes. = 15 minutes.
so, in 1 hour the car can cover 70 km.
so,in 1 minute it can cover 7/6 km.
so,in 18 minuted it can cover 21 km.
now,speed = 84 km/h
d/t = 84
21 /t = 84
t = 21/84 hours.
= 210/14 = 105/7 minutes. = 15 minutes.
Sumit0026:
aweaome thx
what is 7/6
i converted the time from hour to minutes.
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