alleryतीन बत्तियां क्रमशः 48 s, 72 s और 108 s में बदलती हैं। कितने सेकंड बाद वे फिर से एक साथ बदलेंगी?
A324
B864
C432
D216
Answer & Solution
Correct answer: C. 432
48, 72 और 108 का LCM = 2^4 x 3^3 = 16 x 27 = 432 सेकंड।
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