Question

Ravi and sikha drive around a circular 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 same time and go in the same direction, after how much time will they meet at the starting point?

Answer 1

LCM of 16 and 20
=2 x 2 x 2 x 2 x 5
=80 min

Answer 2

Heya !!!


Time Taken by Ravi to complete one round = 16 minutes.


And,



Time Taken by Sikha to complete one round = 20 minutes.


Required Number of minutes = LCM of 16,20


Prime factorisation of 16 = 2 × 2 × 2 × 2


Prime factorisation of 20 = 2 × 2 × 5



Therefore,


LCM of 16 and 20 = (2 × 2 × 2 × 2 × 5) = 80



Hence,



Both will meet at the starting point after 80 minutes.




HOPE IT WILL HELP YOU........ :-)