X, Y and Z are three contestants in a race of 1000 m. Assume that all run with different uniform speeds. X gives Y a start of 40 m and X gives Z a start of 64 m. If Y and Z were to compete in a race of 1000 m, how many metres start will Y give to Z?
A
20
B
25
C
30
D
35
Correct Answer: Option B
Explanation
This problem tests a concept that has appeared in CSAT before, like in 2015 and 2018: wh