Question

kishore can run at 6km\h while his son run 3.6km\h .They decided to race and touch a golf-post on the other side of a field. Starting of together, the son touches the golf-post 12 seconds his father. How far is the golf-post from their starting point?

Answer 1

Answer:

Speed of Kishore = 6 km/h= 5/3 m/s

Speed of his son = 3.6 km/h = 1m/s

let the distance be 1m

Time taken by Kishore to cover a dist. of 1m = 3/5s

Time taken by his son to cover a dist. of 1m = 1s

Difference in time taken by both = 1s-3/5s=2/5s

Actual difference= 12s

Dist. covered when the time difference is 2/5s = 1m

Dist. covered when the time difference is 12s = (1÷ 2/5) x12m = 30m

ans = 30m