Question

A train increases its speed form 10m/s to 20m/s in 1 minute.
What is its average speed during this time in m/s?​

Answer 1

Answer: 15 m/s

Explanation:

Ok, if something is "increasing it's speed steadily ". It means it is acceralating at a constant rate. That means that the average speed is :

The initial speed + the final speed /2

This is (10+20)/2

= 30/2

=15 m/s

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Answer 2

First we will find acceleration with v-u/t then we will put values into the equation v^2 - u^2 = 2as
To find the speed then to find average speed ie. Total distance/ total time