Question

Distance: Jack and Jill start from the same point and walk in'opposite directions. Jack

walks 2 kmh faster than Jill. After 3 hours they are 30 kilometers apart. How fast did

each walk?

Answer 1

t = 6 km/hour

And, J would be 4 km per hour

Explanation:

Let us assume the speed of Tom be T

And, the Speed of Jim be J

Given that

T - J = 2 km /hr ...........(i)

After 3 hours distance between them = 30 km

As they are walking in the opposite direction

Thus,

Net speed =T + J

L ÷ (T+J) = 3

30 ÷ (T+J) = 3

T +J =10 ..............(2)

After solving these two equations

2T = 12

t = 6 km/hour

And, J would be 4 km per hour