Question

A train cover 40 km in 45 minutes and next 60km in 80 minutes. What is its average speed for whole journey in km/h ?​

Answer 1

Answer:

48

Step-by-step explanation:

total distance = 100km

total time taken = 125 mins

= 125/60 = 25/12 hr

avg. speed =100/25/12=48 km/hr

Answer 2

The average speed for whole journey in km/hr is 48 kilometer per hour

Solution:

We have to calculate the Average speed of the train which covers cover 40 km in 45 minutes and next 60 km in 80 minutes

The average speed is given as:

$\text { Average Speed }=\frac{\text { Total Distance }}{\text { Total Time }}$

Here Total distance = 40 + 60 = 100 km

Total Time = 45 + 80 = 125 minutes

Convert 125 minutes to hour:

1 minute = $\frac{1}{60} hour$

125 minutes = $125 \times \frac{1}{60}hour$

Plugging in the values in formula, we get

$\text { Average Speed }=\frac{100}{\frac{125}{60}}=\frac{100}{2.08333}=48$

Hence the average speed for whole journey in km/hr is 48 kilometer per hour

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