a car travelled the one one third of a journey with a speed of 72km/h.with what speed should he covers the remaining distance so that the average speed for the whole journey is 90km/h
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Irony14:
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Its 99km/hr
1st part covered with 72km/h
If other 2/3rd part are covered with 99km/h
So,
99*2 =198 +72(which is the first part)
Then,
270 is the sum of speeds which is divided into 3 parts so avg speed is 90km/h.
Its 99km/hr
1st part covered with 72km/h
If other 2/3rd part are covered with 99km/h
So,
99*2 =198 +72(which is the first part)
Then,
270 is the sum of speeds which is divided into 3 parts so avg speed is 90km/h.
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