a person travels equal distances with speeds of 7 km / hr , 8 km / hr and 9 km / hr and takes a total time of 47 minutes . the total distance is ?
"let the total distance be 3 x km . then , x / 7 + x / 8 + x / 9 = 47 / 60 36 x / 95 = 47 / 60 = > x = 2.07 . total distance = 3 * 2.07 = 6.2 km . answer : a"
multiply(multiply(divide(divide(47, const_60), add(add(divide(const_1, 7), divide(const_1, 8)), divide(const_1, 9))), const_3), const_1000)