If a varies directly as b ,and if a=5 when b= 6,find a when b-1 = 11.
Mannt:
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a=Kb
5=k×6
k=6\5
a=kb
a=6\5×|2
a=|o
5=k×6
k=6\5
a=kb
a=6\5×|2
a=|o
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