Well this type of problems isn't exactly my strong suit, but I tried to come up with a solution, so my reasoning is as follows: we know that 1km is 0.621 miles, and the problem incites us to find how much time 1 mile takes, so we need to find how many kms are in a mile: 1km ---> 0.621 miles <=> 1/0.621=1.610 km ---> 0.621/0.621 = 1 mile so 1 mile = 1.610 km Next we need to know how much time 1.610 km takes to run across We know that: 10 km take 55 mins and 1.610 = 10/6.211 so we need to divide 55 by the same value 55/6.211 = 8.855 mins So 10 km ---> 55 mins 1.610 = 10/6.211 km ---> 55/6.211 = 8.855 mins
