Question

a car travels from A to B with a speed of 30 kilometre per hour and returns back to a speed of 50 kilometre per hour find distance​

Answer 1

Answer:

80 kilometre

Explanation:

because the car goes 30 km per hour and returns back 50 km per hour

Answer 2

Answer:

Let the distance from A to B be x.

Then displacement of the car when it comes back to the same position is zero.

But the distance travelled is 2x.

Time taken by the car when it moves from A to B is given by

t1 = Distance/Speed = x/30

Time taken by the car when it moves from B to A,

t2 = Distance/Speed = x/50

Total distance = 2x

Total time = t1 + t2 = x/30 + x/50 = (5x + 3x)/150 = 8x/150