Finding the length of the circuit.

1. Jun 9, 2016

paulmdrdo

1. The problem statement, all variables and given/known data

2. Relevant equations
D = rt

3. The attempt at a solution

This is my attempt

let d= length of the circuit
60/a mph --- speed for walking
60/b mph ----speed for riding
60/c mph ---- speed for driving

d=(60/a)t1+(60/b)t2+(60/c)t3

From here I cannot continue. Kindly help me. Thanks!

2. Jun 9, 2016

ehild

Use the information given in the problem for the times of the different routes, using some notation for the sides of the triangle.