a : b = 5 : 9 and b : c = 4 : 7 then a : b : c is _________
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HEYA MATE...
a : b = 5 : 9
b : c = 4 : 7
LCM of 9 and 4. That is 36.
Therefore a : b =
(Multiply by 4) 5x4 : 9x4 = 20 : 36
B : c = (multiply by 9) 4x9 : 7x9
= 36 : 63
When figure against b is made same (as b =36 above),
Ratio a : b : c = 20 : 36 : 63
HOPE IT WILL HELP YOU.....
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