if a person walks at 15 km / hr instead of 10 km / hr , he would have walked 20 km more . the actual distance traveled by him is ?
"let the actual distance traveled be x km . then , x / 10 = ( x + 20 ) / 15 5 x - 300 = > x = 60 km . answer : d"
multiply(10, divide(20, subtract(15, 10)))