Carmen rides her bicycle at a constant rate to the market. When she rides her bicycle back home along the same route, she bikes
at three-quarters the rate she biked to the market. At any given time, t, the distance biked can be calculated using the formula d = rt, where d represents distance and r represents rate. If the trip home takes 12 minutes longer than the trip to the market, how many minutes does it take Carmen to bike home?
It can be easily assumed that most information's are already given in the question. Based on those information's, the answer can be deduced.
rt = [(3/4)r] * (t + 12) 4rt = 3r (t + 12) 4rt = 3rt + 36r 4rt - 3rt = 36r rt = 36r t = 36 From the above deduction we can conclude that the time taken by Carmen to ride to the market is 36 minutes Then Time taken by Carmen to ride home = 36 + 12 = 48 minutes
