The ratio between the speeds of two trains is 7: 8. If the second train runs 400 kms in 4 hours, then the speed of the first train is ?
A) 83.5 km/hr B) 84.5 km/hr C) 86.5 km/hr D) 87.5 km/hr
Answers
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70 km/hr
Step-by-step explanation:
Speed = Distance/ Time
2nd train:— speed = 400/5
= 80 km/hr
1st train speed = (80/8)*7 km/hr
= 70 km/hr
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