question_answer

Three friends Thomas, Harry and James went for the marathon and start their run at 6 a.m. and run through planes and hills on their way and return at 12 p.m. If their speed on the plane ground is 4 km/h, up the hill it is 3km/h and down the hill it is 6km/h. find the total distance they cover during the whole journey.

A) 15km    

B) 10km       

C) 12km   

D) 18km   

E) None of these