Question

A train travels 76 kilometers in 4 hours, then travels 63 kilometers in 4 hours. What is its average speed

Answer 1

What is \[\frac{ 76km+63km }{ 2 }\] ?

Answer 2

\[average ~speed=\frac{ 76+63 }{ 4+4 }=?\]

Answer 3

@surjithayer
That's not going to work. You should write it like this:
\[\frac{ (76*4)+(63*4) }{ total hours traveled }\]

Answer 4

if it is written for 4 hours it runs at a speed of 76 kn/ hr and for next 4 hours it runs at a speed of 63 kh/hr. then it can be solved as you have written.