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The ratio between the speeds of two trains is 7:8.if second train runs 400 Kms in 5 hours find the speed of first train?
Most Upvoted Answer
The ratio between the speeds of two trains is 7:8.if second train runs...
Given:

Ratio of speeds of two trains = 7:8

Distance covered by second train = 400 km

Time taken by second train = 5 hours


To find:

Speed of first train


Solution:

Let the speeds of first and second trains be 7x and 8x respectively.

We know that distance = speed x time

Distance covered by second train = 8x * 5 = 40x

Given, distance covered by second train = 400 km

40x = 400

x = 10

Therefore, speed of first train = 7x = 7 * 10 = 70 km/h


Answer:

The speed of first train is 70 km/h.
Community Answer
The ratio between the speeds of two trains is 7:8.if second train runs...
Speed of the two trains= 7:8
Second Train Speed= 400 km in 5 hrs
so,
take: S1= speed of first train, S2= Speed of second train.
now, S2 = 400÷ 5 = 80
7/8 = S1/S2
S2 = 80
= 7/8 = S1/80
7 × 80 = 8×S1
560 = 8S1
S1 = 560/8 = 70 km
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The ratio between the speeds of two trains is 7:8.if second train runs 400 Kms in 5 hours find the speed of first train?
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