A is chasing B in the same interval of time, A jumps 8 times, while B jumps 6 times, But the distance covered by A in 7 jumps is the same as that of B in 5 jumps. The ratio between the speeds of A and B is ________ .
Answer & explanation
Correct answer: option 3
7 jumps of A = 5 jumps of B
8 jumps of A = \(\frac{5}{7}\) x8 jumps of B
= \(\frac{40}{7}\) jumps of B
The required ratio = \(\frac{40}{7}\) : 6
= 40 : 42 = 20 : 21