unfortunately, teachers are lazy & arrogant, not much into teaching 12y oles, when in 11 - 18y school, they are only interested in teaching 15y+ to ivy leagues, not extending younger minds ?!

my nephew e-mailed this problem to me & he was upset as in 1 hour lesson, teacher wrote this problem on board after 40 minutes, asked kids to solve it, & sat back reading enquirer for rest of 20'00 in a top school, & after time allotted, laughed when none of the elite 30 kids coud solve it & ridiculed them as they left the class...

i'll post problem

i'll admit, it took me lotta time to work it out ~ 1'38.97 - 3'24.23

i ask :

1) how long did it take to work out for you ?

2) how long woud you expect even a gifted 12y ole to work it out ( gifted, not a genius ) ?

**"If i can run 10km/h & walk at 5km/h, derive a formula for how long it will take me to cover a distance of**

**D**km, if i run for**R**hours & walk the rest ?