A is 1\(\frac{2}{5}\) times faster than B. A gives 80 mtr start to B in a race. Find the total distance of race if both finish the race at the same time.

280 m

                      A       :         B

Speed :          7        :         5 

Distance:       7        :         5     ⇒ 2R (start)

2R = 80m,

1R = 40m

7R = 280m = Total distance of race