Question

a cheetah is running at a speed of 90km/h,a train is moving at a speed of 60km/h whereas another train is moving at a speed of 10m/s. Which of these is the fastest?

Answer 1

Heya!!!

Given:

Speed of Cheetah = 90km/h

Speed of first train = 60km/h

Speed of second train = 10m/s =10/1000×3600=36km/h

So obviously , 90>60>36

.°. Cheetah is the fastest

Answer 2

HIII
YOUR ANSWER IS HERE, 
ACCORDING TO THE QUESTION,
SPEED OF CHEETAH = 90 km/h
SPEED OF TRAIN = 60 km/h
SPEED OF TRAIN(II) = 10 m/s

AS THE SPEED OF THE THREE ARE NOT IN THE SAME UNITS, THEREFORE, WE CONVERT THEM IN SAME UNITS.
AS THE SPEED OF TWO IS IN km/h, SO WE CONVERT THIRD IN km/h.
 10m/s = 10 X 18/5 = 36km/h. ( TO CONVERT m/s TO km/h, WE HAVE TO                                                    DIVIDE THE SPEED IN m/s BY 5/18.)
NOW THE SPEED OF TRAIN(II) IS 36 km/h.
            90 > 60> 36
THEREFORE, WE CAN CLEARLY SAY THAT THE SPEED OF CHEETAH IS FASTEST.