45
Q:
A) 140:144:147 | B) 40:44:47 |
C) 15:21:28 | D) 252:245:240 |
Answer: A) 140:144:147
Explanation:
Explanation:
Frequency of step of A:B:C = 5 : 6 : 7
But in terms of size of step, 6A = 7B = 8C
Therefore, Ratio of speeds of A, B and C = 5/6 : 6/7 : 7/8 = 140 : 144 : 147