Question

a train covers 30 km of its journey in 20min. , the second 50 km in 20min. , and 20 km. in 10min. , find the average speed​

Answer 1

Answer:

120km/h

Average speed =

$\frac{total \: distance}{total \: time}$

$\frac{30 + 50 + 20}{ \frac{50}{60} }$

= here ( I converted minutes to hours)

$100 \times \frac{60}{50}$

= 120 km / h is your answer

Hope it helps

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Answer 2

Explanation:

here is your answer friend

120km/h

Average speed =

\frac{total \: distance}{total \: time}

totaltime

totaldistance

\frac{30 + 50 + 20}{ \frac{50}{60} }

60

50

30+50+20

= here ( I converted minutes to hours)

100 \times \frac{60}{50}100×

50

60

= 120 km / h is your answer

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