Femi and Hina are both travelling by train. Femi's train travels 120 km in 90 minutes.
Hina's train travels 495 km.
It leaves at 12:05 and arrives at 17:35.
Work out the difference, in km/h, between the average speed of their trains.

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)

2+2 obliviously is 4.