when a train travels at a speed of 70 kmph , it reaches the destination on time . when the same train travels at a speed of 50 kmph , it reaches its destination 15 min late . what is the length of journey ?
"let x be the time reached with the speed 70 km / h 50 km / h - - - - > x + 15 distance is equal so 70 ( km / h ) × xhr = 50 ( km / h ) × ( x + 15 ) hr so 70 x = 50 x + 750 so the would be in km and x = 37.5 answer : a"
multiply(const_60, divide(multiply(divide(15, const_60), 50), 50))