1.

If the ratio of HM and GM of two quantities is 12:13 then the ratio of the number is

Answer»

H.M÷G.M=2√(ab)/(a+b)
where a and b are the two numbers
LET 2√(ab)=12k => ab=36k^2
and a+b=13k
solving these two EQUATIONS we GET
a=9k and b=4k
so a:b=9:4


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