8.
|
In a 100 m race, A beats B by 10 m and C by
13 m. In a race of 180 m, B will beat C by:
|
|
A.
|
5.4 m
|
B.
|
4.5 m
|
|
C.
|
5 m
|
D.
|
6 m
|
|
Answer: Option D
Explanation:
A : B = 100 : 90.
A : C = 100 : 87.
|
B
|
=
|
B
|
x
|
A
|
=
|
90
|
x
|
100
|
=
|
30
|
.
|
|
C
|
A
|
C
|
100
|
87
|
29
|
When B runs 30 m, C runs 29 m.
|
When B runs 180 m, C runs
|
|
29
|
x 180
|
m
|
= 174 m.
|
|
30
|
B beats C by (180 - 174) m = 6 m.
