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The ratio between the speeds of two trains is 7 : 8.
Question 1:
The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
A.
70 km/hr
B.
75 km/hr
C.
84 km/hr
D.
87.5 km/hr
Feedback
Let the speed of two trains be 7x and 8x km/hr.
Then, 8x = 400/4 =100
x=100/8 =12.5
Speed of first train = (7 x 12.5) km/hr = 87.5 km/hr.
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