Question

A train travels with the speed of 60km/hr from station a to station b and then comes back with a speed of 80 km/ hr from station b to station



a. Find the average speed

Answer 1

average speed has 2 formulas

average speed =total of all the speeds       ............................ (1)

                             -----------------------------

                                  no.of speeds

here we r given two speeds

so we can use (1)

so av speed = 60+80

                         -------

                           2

=140

---------

2

= 70

hence average speed is 70 kmph

hope it helps