Answer: Option D
Explanation:
A : B = 100 : 90.
A : C = 100 : 87.
When B runs 30 m, C runs 29 m.
B beats C by (180 - 174) m = 6 m.
Answer: Option B
A : B = 100 : 80.
A : C = 100 : 72.
B can give C 10 points.
Answer: Option C
B runs 35 m in 7 sec.
B's time over the course = 40 sec.
A's time over the course (40 - 7) sec = 33 sec.