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A B and C start together from the same place to...

This question belongs to Arithmetic Ability Speed Time And Distance
Speed Time and Distance
?

A, B and C start together from the same place to walk round a circular path of length 12km. A walks at the rate of 4 km/h, B 3 km/h and C $$\frac{3}{2}$$ km/h. They will meet together at the starting place at the end of:

Answer & Solution
Correct Answer: Option D
Time taken to complete the revolution:
A → $$\frac{{12}}{{4}}$$ = 3 hours
B → $$\frac{{12}}{{3}}$$ = 4 hours
C → 12 × $$\frac{{2}}{{3}}$$ = 8 hours
Required time,
= LCM of 3, 4, 8.
= 24 hours.
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