The least common multiple of a and b is 42. The LCM of 5a and 11b is :
Answer & explanation
Correct answer: option 1
The least common multiple of a and b is 42
According to the question,
LCM(a, b) = 42
LCM(5a, 11b) = LCM{LCM(5,11)(a,b)}
LCM(5a, 11b) = 5 × 11 × 42 = 2310