here is the full information about the question. Ilya and Anya each can run at a speed of 8.50mph and walk at a speed of 3.50 mph . They set off together on a route of length 5.00 miles . Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half.
the calculation would be:
t = d / s
t = 2.5 (half of the total distance) / 8.5 (speed of running)
This is .294 hours which is about 1058s...
for the walking part...
t = d / s
t = 2.5 / 3.5
t = 5/7hours = 2571 s.
