Question

7.
A train runs for 3 hours at the rate of 65 km/hr and in next two hours its
speed increases to 70 km/hr. Find the average speed of the train during
5 hours journey.​

Answer 1

Answer:

3 hrs of 65 km/hr 79 km/hr

this formal has been x-y (x+y)+ x2+y2

this is help full pls make me brainlist