Question

if a 30 cm ruler of steel weighs 50 g what will be the weight of a metre scale

Answer 1

$\bold \green{hey \: mate}$

30 : 50 :: 100 : x
From laws of proportion we get
30 * 100 / 50
= 60g

$<marquee direction="left" >so the correct answer is 60g </marquee>$

$\bold \pink{i \: hope \: it \: helps}$