Question

Ravin and Skha drive around a circualr sports field. Ravi takes 16 minutes to take one round while sikha completes the round in 20 minutes. If both start at the same point at the same time and go in same direction, after how much ltime will they meet at the starting point ? [

Answer 1

Required number of minutes = LCM(n 16,20)
Now , ` 16 =- 2^(4) and 20 = ( 2^(2) xx 5)`
LCM ( 16,20) = ( ` 2^(4) xx 5) = ( 16xx 5) = 80`
Hence , both will meet at the starting point after 80 minutes.