Problema Solution
Stan and Hilda can mow the lawn in 40 min if they work together. If Hilda works twice as fast as Stan, how long would it take Stan to mow the lawn alone?
Answer provided by our tutors
Time Stan needed: 2x
Time Hilda needed:x
So the equation is
1/2x + 1/x = 1/40
So
x = 60
So Time Stan needed is 60*2 = 120 min