Question

a train covers the first 30 km of its journey in 20 m, the next 50 km in another 20 m and the last 20 km in 10 m. calculate the average speed of the train.​

Answer 1

$Given:−</p><p></p><p>A train covers the first 30 km of its journey in 20 minutes.</p><p></p><p>The next 50 km in another 20 minutes,</p><p></p><p>The last 20 km in 10 minutes.</p><p></p><p>\sf \blue{\underline{\underline{To\:Find:-}}}ToFind:−</p><p></p><p>The average speed of the train.</p><p></p><p>\sf \green {\underline{\underline{Solution:-}}}Solution:−</p><p></p><p>\boxed{\sf \purple{Average \: \: speed \: = \frac{Total \: \: distance \: }{Total \: \: time} }}Averagespeed=TotaltimeTotaldistance</p><p></p><p>\sf{ \:Total \: distance \: = 30km + 50km + 20km}Totaldistance=30km+50km+20km</p><p></p><p>\sf{ = 100km}=100km</p><p></p><p>\sf total \: \: time \: = 20min \: + 20min + 10mintotaltime=20min+20min+10min</p><p></p><p>\sf = 50 minutes=50minutes</p><p></p><p>\sf Average \: speed = \dfrac{100}{50}Averagespeed=50100</p><p></p><p>\sf = 2=2</p><p></p><p>\boxed{ \sf \pink{Average \: speed \: = 2m/s}}Averagespeed=2m/s</p><p></p><p>$

Answer 2

Step-by-step explanation:

1. Total distance travelled by the train = 30 km + 50 km + 20 km = 100 km
2. = (20 + 20 + 10) minutes
3. 50 minutes
4. 15 by 60 hours = to 5 by 6 hours