Question

The ratio of two numbers is 7:9and HDF is 5.Their LCM will be

Answer 1

Answer:

LCM = 5/63

Step-by-step explanation:

Let the numbers be 7xand 9x

LCM ×HCF = product of 2 numbers

5× LCM = 7x × 9x

5 × LCM = 63x^2

LCM = (63x^2)/5

LCM of 7x and 9x = 63x

63x = (63x^2) /5

5 = (63x^2 )/63x

5 = 63x

x = 5/63

LCM =( 63x^2) / 5

= (63 /5 ) × (5/63)^2

= 5/63

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