Math, asked by sainadhvm, 1 year ago

The ratio Between the speed of a truck car and train in 3:8:9.The car moved uniformly and covered a distance of 1040 KM in 13 hours.what is the average speed of the truck and train together?

Answers

Answered by ParvezShere
1

Answer:

Answer is 60.

Step-by-step explanation:

Attachments:
Answered by amitnrw
4

average speed of the truck and train together = 45 km/hr for 1040 km Distance  & 60 km/hr for given time

Step-by-step explanation:

The ratio Between the speed of a truck car and train in 3:8:9

The car moved uniformly and covered a distance of 1040 KM in 13 hours

Speed of Car = 1040/13 = 80 km/Hr

Speed of Truck = 30 km/hr

Speed of Train = 90 km/hr

Average speed of Truck & train together for 13 hrs

Distance Covered by Truck = 13 * 30 = 390 km

Disance Covered by Train = 13 * 90 = 1170 km

390 + 1170 = 1560 km

Time taken = 13 + 13 = 26 hrs

Average speed = 1560/26 = 60 km/Hr

Average speed of Truck & train together for 1040 km

Time taken by Truck = 1040/30  =  104/3 hrs

Time taken by Train = 1040/90  = 104/9  hrs

Total time taken = 104/3  + 104/9

= 4 * 104/9  hrs

Total Distance = 2 * 1040 km

Average Speed = (2 * 1040)/(4 * 104/9)  = 45 km/Hr

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