Question

The ratio of a number is 3 to 4. If their lcm is 180 find number

Answer 1

let the two numbers be 3x and 4x

then hcf will be x

formula is 3x×4x=lcm×hcf

3x×4x=180x

12x=180x

x=15

therefore

nos are 45 and 60

Answer 2

LET THE NO. BE 3X AND 4X

3X×4X = 180

12X²= 180
X² = 180/12
X= 15