a and b go around a circular track of length 300 m on a cycle at speeds of 18 kmph and 54 kmph . after how much time will they meet for the first time at the starting point ?
"time taken to meet for the first time at the starting point = lcm { length of the track / speed of a , length of the track / speed of b } = lcm { 300 / ( 90 * 5 / 18 ) , 300 / ( 54 * 5 / 18 ) } = lcm ( 12 , 20 ) = 60 sec . answer : c"
divide(300, subtract(multiply(54, const_0_2778), multiply(18, const_0_2778)))