Question

1. find the speed of a train that travels 243 kilometres in 2 hours and 15 minutes.

Explanation:

Step1: Convert time to hours

15 minutes is $\frac{15}{60} = 0.25$ hours. So total time is $2 + 0.25 = 2.25$ hours.

Step2: Use speed formula

Speed formula is $Speed = \frac{Distance}{Time}$. Distance is 243 km, time is 2.25 hours. So speed is $\frac{243}{2.25}$.

Step3: Calculate the speed

$\frac{243}{2.25} = 108$ km/h.

Answer:

The speed of the train is 108 kilometres per hour.