The ratio of speed of A and B is 7 : 10 and A loses the race by 210 m, then find the length of the race.
Answer & explanation
Correct answer: option 4
The time is same for A and B.
Therefore, Distance ∝ Speed,
A : B
Speed 7 : 10
Distance 7 : 10 Difference = 3R
3R = 210
1R = 70
The length of race = distance covered by B = 10 × 70 = 700 m