Finding the length of the circuit.

D = rt

The Attempt at a Solution

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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!

ehild
Homework Helper

D = rt

The Attempt at a Solution

[/B]
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!
Use the information given in the problem for the times of the different routes, using some notation for the sides of the triangle.