a participated in cycling contest and he drove the lap at the rate of 6 kmph , 12 kmph , 18 kmph , 24 kmph . . what is his average speed ?
= 4 x / ( x / 6 + x / 12 + x / 18 + x / 24 ) = 11.52 answer : d
divide(subtract(multiply(const_100, const_3), const_12), add(24, const_1))