In a 100 m race, A can give B 10 m and C 28 m. In the same race B can give C:

Question:
In a 100 m race, A can give B 10 m and C 28 m. In the same race B can give C:

[A].

18 m

[B].

20 m

[C].

27 m

[D].

9 m

Answer: Option B

Explanation:

A : B = 100 : 90.

A : C = 100 : 72.

B : C =	B	x	A	=	90	x	100	=	90	.
	A		C		100		72		72

When B runs 90 m, C runs 72 m.

When B runs 100 m, C runs		72	x 100	m	= 80 m.
		90

B can give C 20 m.