Question

A train travels at a certain average speed for a distance of 80km and then travels a distance of 24km at an average speed of 5km /hr more than its original speed. If it takes 4 hours to complete the total journey, what is its original average speed?
(Class10 quadratic equations)

Answer 1

Answer:

Its original average speed is 21km / hr

Suppose the original average speed is Xkm /h

Time =distance /speed

4=80+24/X+5

X=104 -20/4

X=21km/hr.

Hope u got it