Question

on a 300 km track A train travels the first 30 km at a uniform speed of 60 km per hour how fast must the train travel the next 270 km so as the average speed 90 km per hour for entire trip​

Answer 1

Answer:

average speed=distance travelled/time taken

90=300/time taken

time taken = 300/90

time taken = 3.3hr

1st train= time=30/60

=0.5 hr

2nd train= let speed be x

d=270 km

speed=distance/time

x=270/time

time=270/x

adding

0.5 + 270/x = 3.3

270/x = 3.3-0.5

270/x = 2.8

x = 2.8×270

x = 756km/h

Answer 2

Answer:95.29

Explanation:

In the following question assume the time for going the rest 270km be x.Now through the avg speed formula calculate the value of x and then find the speed using 270/x