In a 200 m race, A beats B by 25 m or by 5 seconds. How long does A take to run the race?

Explanation

1. 01

   B covers the 25 m in 5 seconds, so B runs at 5 m/s and takes $\frac{200}{5} = 40$ seconds for the race.

2. 02

   A finishes 5 seconds earlier: 35 seconds.