The ratio between speed of the two trains is 7:8. If the 2nd train runs 400 km in 4 hrs, what is the speed of the 1st train?	Options:
A) 87.9
B) 87.5
C) 87.7
D) 87.6
E) 43.3

Rationale: answer : b explanation : speed of 2 nd train = 400 / 4 = 100 kmph since the ratios are in 7 : 8 speed of first train = 7 / 8 × 100 = 87.5 kmph answer : b
Answer: B