Question

Sam weighs 4 times as heavy as Andy and twice as heavy as John. The three boys weigh 147 kg altogether. (a) How heavy is Andy? (b) How heavy is Sam?​

Answer 1

A=21kg

J=42kg

S=84kg

Explanation:

Anna's weight=A

Sams=S

Jons=J

S=4A A=S/4

S=2J J=S/2

substitute values

S+A+J=147

S+S/4+S/2=147

7S/4=147

S=84

A=84/4

=21

J=84/2

=42