1. A car travels from stop A to stop B with a speed of 30 km/h and then returns back to A with a speed of 50 km/h. Find distance travelled by the car.
Answers
Answer:
we can't find the distance of the given problem because here the information which is required is not there
but if u want to find the displacement of the given question then the ans is zero because here the final and initial position is same
Explanation:
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Answer:
Displacement is the shortest distance between the initial position and the final position. Here, the car travels from stop A to stop B and then returns back to stop A.
Thus, the displacement of the car is 0 m/s.
Let the distance travelled by the car from stop A to stop B = x km.
The car travels from stop A to stop B and returns back to point A.
Total distance travelled = 2x km.
Time taken while going from stop A to stop B = Distance travelled / Speed taken
= x/30 hrs
Time taken while returning from stop B to stop A = Distance travelled / Speed taken.
= x/50 hrs.
Total time taken = x/30 + x/50
= (50x + 30x)/1500
= 80x/1500
= 8x/ 150
= 4x/75 hrs
Average speed = Total distance traveled/ total time taken.
= 2x x 75/4x
= 150x/4x
= 37.5 km/h.