1.  In a 100 m race, A can beat B by 25 m and B can beat C by 4 m. In the same race, A can beat C by:
A. 21 m
B. 26 m
C. 28 m
D. 29 m

Answer: Option C

Explanation:

A : B = 100 : 75

B : C = 100 : 96.

A : C = A x B = 100 x 100 = 100
B C 75 96 72

= 100 : 72.

A beats C by (100 - 72) m = 28 m.