two cars are driving toward each other . the first car is traveling at a speed of 60 km / h , which is 25 % slower than the second car ' s speed . if the distance between the cars is 770 km , how many hours will it take until the two cars meet ?
"the speed of the first car is 60 km / h . the speed of the second car is 60 / 0.75 = 80 km / h . the two cars complete a total of 140 km each hour . the time it takes the cars to meet is 770 / 140 = 5.5 hours . the answer is d ."
divide(add(multiply(60, const_4), multiply(divide(multiply(const_4, 60), add(const_1, const_4)), const_4)), add(60, divide(multiply(const_4, 60), add(const_1, const_4))))