Question

If B is directly proportional to A and B = 3 when A = 18, the value of B when A= 30

Answer 1

Answer:

5

Step-by-step explanation:

B directly proportional to A or B:A is constant

3 :18 = 5:30

Answer 2

Answer:

the value of B is 5

Step-by-step explanation:

A

$a \alpha b \: and \: so \: a = kb \\ whena = 18 \: b = 3 \\ then \: value \: of \: k \: is \: 6 \\ therefore \: when \: a \: value \: is \: 30 \: \\ then \: b = a \div k \: e.g.30 \div 6 = 5 \\ hence \: b \: value \: is \: 5$