Question

B varies directly as c. If b=36 when c= 18, find b when c is 42

Answer 1

Answer:

the value of b when c=42 is b=84

explaination

c/b when b=36 ,c=18

c/b=18/36=1/2

therefore when c=42

let b be x

c/b=1/2=42/x

by cross multiplying we get

84=x

hence b=84