1.

If a varies inversely as b+2 and if a 8 when= 1.5, find a when b-5.2(a) 2(b) 54(d) 4

Answer»

let a = k/(b+2)

now put a = 8 and b = 1.5 , to get the value of k

=> 8 = k/(1.5+2) => 8 = k/3.5 => k = 8*3.5 = 28

now the expression becomes a = 28/(b+2)

so, when b = 5 a = 28/(b+2)=> a = 28/(5+2) = 28/7 = 4

option C


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