Two people walk the same distance of 15miles, in which A spends 15 minutes less than B, and the speed of B is 10miles/h slower than the speed of A. What is the speed of B?
Two people walk the same distance of 15miles, in which A spends 15 minutes less than B, and the speed of B is 10miles/h slower than the speed of A. What is the speed of B?