Question

A train is running at a speed of 72 km/hr. How long will it take to cover distance of 300 km? [Ans: 4.16h​

Answer 1

Answer: 4.1667 hours

Step-by-step explanation:

We can use the average velocity formula to help us solve this question. This formula finds the velocity by dividing the displacement by the change in time. We are solving for time (t) and know the displacement (300 km) and velocity (72 km/hr).

`\displaystyle v=(\triangle x)/(\triangle t)`

`\displaystyle 72\;\text{km/hr}=\frac{300\;\text{km}}{t}`

`\displaystyle (t)(72\;\text{km/hr})=300\;\text{km}`

`\displaystyle t=\frac{300\;\text{km} }{72\;\text{km/hr}}`

`\displaystyle t=4.1\overline{6} \;hrs \approx 4.1667\;hrs`