### Question

**The ratio between the speeds of two trains is 7: 8. If the second train runs 440 km in 4 hours, then the speed of the first train is:**

A. 45.4 km/hr

B. 96.25 km/hr

C. 87.13 km/hr

D. 57.18 km/hr

**Answer:** B

**Solution:**

Let the speed of two trains be 7x and 8x km/hr

Then,

8x = (440/4)

= 110

x = (110/8)

= 13.75

Hence, speed of first train = (7 x 13.75) km/hr

= 96.25 km/hr