Question

At 4pm Rui Leng, Kreircel and
Ethan are at the starting point
0f a 2.4 km circular path. Rui take 126 seconds, Hhairal takes 154
second and Ethan take 198
second respectively to complete one round around the pathWhen will they will meet again​

Answer 1

Answer:

1386 seconds later

Step-by-step explanation:

If they continue with same speed they will meet after 1386 seonds from start

CALCULATE LCM

Decompose all numbers into prime factors

126 - 2 3 3 7

154 - 2 7 11

198 - 2 3 3 11

Write all numbers as the product of its prime factors

Prime factors of 126 = 2 . 3^2 . 7

Prime factors of 154 = 2 . 7 . 11

Prime factors of 198 = 2 . 3^2 . 11

Choose the common and uncommon prime factors with the greatest exponent

Common prime factors: 2

Common prime factors with the greatest exponent: 2^1

Uncommon prime factors: 3 , 7 , 11

Uncommon prime factors with the greatest exponent: 3^2, 7^1, 11^1

Calculate the Least Common Multiple or LCM

1386

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