Two boys started runing stright to ward each other from two pionts 100m aparts. one run at speed of 4m/s and other at 6m/s. how far are they from the slower one's starting point when they meet

One boys rate is "r" and the other's is (r+10)

the distance they cover is 240 miles in 3 hours

3r + 3*(r+10) = 240

6r + 30 = 240

6r = 210

r = 35 mph and the faster car is

r + 10 = 45 mph

radiation warms things up temp rises convection currents air circ windy weather

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000