1. The problem statement, all variables and given/known data A 727 jet needs to attain a speed of 200 mph to take off. If it can accelerate from 0 to 200 mph in 30 seconds, how long must the runway be? (Assume constant accleration). Show all your work and include units in your answer. 2. Relevant equations 3. The attempt at a solution Since v = dx/dt = 200t I took the integral of dx = integral of 200t dt and I got x = 100t^2 + C So I plugged in 0.5 as t and got x = 25. So x = 25 miles? But.. 25 miles sounds wrong for an airplane runway.. where did I go wrong?