Question

Suppose two cars depart from a four-way intersection at the same time, one heading north and the other heading west. The car heading north travels at the steady speed of 40 ft/sec and the car heading west travels at the steady speed of 64 ft/sec.

When are the two cars 1 mile apart? (Round your answer to one decimal place.)
answer in seconds

Answer 1

50.76922

after 50.8 seconds because

50.76922*40 +50.76922*64= 5279.99 which rounds to the admit if feet in a miles