Answers

2014-08-12T22:47:10+08:00
They are 4km apart after 10 mins.

Runner A= 15km/h, 10mins (15/6)= 2.5 km

Runner B= 9km/h, 10 mins (9/6)= 1.5 km

2.5 + 1.5 = 4 km

0