Question

George cycles to go half the distance at 4m/s but slows to 3m/s for the second half of his trip.he takes 35minutes to complete the trip.find the distance he travels

Answer 1

T = (d/2)/r1 + (d/2)/r2 = 35 min=2100 s.

= (d/2)/4 + (d/2)/3 = 2100 =
d/8 + d/6 = 2100
Multiply both sides by 24:
3d + 4d = 50,400
7d = 50,400
d = 7,200 m.