Question

train covers the first 160 km of journey at 40 km per hour the next 180 kilometre at 45 kilometre per hour and the last 200 kilometre at 50 km per hour find the total time and its take to complete the journey and the average speed of the train during the whole journey​

Answer 1

Answer:

QUESTION:-

Train covers the first 160 km of journey at 40 km per hour the next 180 kilometre at 45 kilometre per hour and the last 200 kilometre at 50 km per hour find the total time and its take to complete the journey and the average speed of the train during the whole journey.

FIND:-

• Average speed
• Total time

SOLUTION:-

Train covers the first 160 km of journey = 40 km/hr.

Train covers the next 180 km of journey = 45 km/hr.

Train covers the last 200 km of journey = 50 km/hr.

:. Total time taken = (160 ÷ 40) + (180 ÷ 45) + (200 ÷ 50)

= 4 + 4 + 4

= 12 hrs.

:. Average speed = Total distance travelled

Total time taken

Average speed = 160 + 180 + 200

12

Average speed = 540

12

Average speed = 45km/hr.