Question

Four runners start running simultaneously from a point on a circular track they took 200sec ,300sec,360sec,450sec to complete one round after how much time to they meet at the starting point for first time

Answer 1

always take lcm for this type of question ..
LCM is the only no which can devide and gives no remainder ..it means all runners completed their rounds
lcm of 200 300 360 450 = 1800 sec
or 30 min

Answer 2

They meet after 30 minutes at the starting point for first time.

Step-by-step explanation:

Since we have given that

Number of runners = 4

Time they took to complete one round is given by

200 sec, 300 sec, 360 sec, 450 sec.

So, We need to find the time they meet at the starting point for first time.

L.C.M. of 200, 300, 360, 450 = 1800 sec

1800 sec = 30 minutes

Hence, they meet after 30 minutes at the starting point for first time.

# learn  more:

Sunita and Anjali start running along a circular track at a time from same position. Sunita can complete one round in 24 minutes and Anjali takes 30 minutes to complete one round. After how many minutes they will meet together at the starting point​

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