Math, asked by harshrgupta2004, 5 months ago

A car covers a distance of 270 kms with some speed. If the speed is

decreased by 10 km/hr, it will take 54 minutes more to cover the same

distance. Find the original speed of the car.

Answers

Answered by PAVITHRAA23
3

Answer:

Let the original speed of the car =xkm/hr

∴ Time taken by it to cover 72km=

x

72

hrs

New speed of the car = (x+10)km/hr

∴ New time taken by the car to cover 72km=

x+10

72

hrs

As per the given condition, time is reduced by 36 minutes

x

72

x+10

72

=

60

36

x

2

+x−1200=0

On solving we get, x=−40 or x=30

Since the speed cannot be negative, so x=30km/hr.

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