Question

Two runners start at the same point and jog at a constant speed along a straight path. Runner A starts at

time t = 0s, and runner B starts at time t = 2. 5 s. The runners both reach a distance 64 m from the starting

point at time t = 25 s.

If the runners continue at the same speeds, how far from the starting point will each be at time t = 45 s?


options:

Runner A's distance will be 115. 2 m, and runner B's distance will be 120. 7 m.

O Runner A's distance will be 64 m, and runner B's distance will be 71 m.

O Runner A's distance will be 115. 2 m, and runner B's distance will be 133. 65 m.

Runner A's distance will be 64 m, and runner B's distance will be 133. 65 m

Answer 1

Va = 64 / 25 = 2.56 m/sec

Vb = 64 / 22.5 = 2.84 m/s

At t = 45

Sa = 2.56 m/s * 45 s = 115 m

Sb = 2.84 m/s * 42.5 s = 121 m

The first option given is the correct description