55. Carrie and Manuel are side by side when they begin to run at the same time in the same direction around a track. Carrie runs at a constant rate of 30 seconds per lap, while Manuel runs at a constant rate of 50 seconds per lap. How many seconds after beginning to run will Carrie have run exactly 1 more lap than Manuel?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assume the total time is x, x/30 is the laps run by Carrie, x/50 is the number of laps run by Manuel, C in the question stem runs one more lap than M, so x/30=(x/50)+1 , the solution is x=75