There are two concentric circular tracks of radii 100 m and 102 m, respectively. A runs on the inner track and goes once round on the inner track in 1 min 30 sec, while B runs on the outer track in 1 min 32 sec. Who runs faster?
Radius of the inner track = 100 m
and time = 1 min 30 sec = 90 sec.
Also, Radius of the outer track = 102 m
and time = 1 min 32 sec = 92 sec.
Now, speed of A who runs on the inner track
=
And speed of B who runs on the outer track
=
Since, speed of A > speed of B
∴ A runs faster than B.