Question

If ratio between two numbers is 3 : 4 and their lcm is 180. the first number is:

Answer 1

refer the pic..
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Answer 2

let the numbers be x
3x,4x respectively
LCM=180
4x*3x=180
12x=180
x=180/12
x=15
3x=3*15 =45
4x=4*15=60
the nos are 45 and 60