Question

The weight of 36 books is 12 kg. What is weight of 75 such books?

Answer 1

$\because$ weight of $36$ books $=12kg$
$\therefore$ weight of $1$ books $=\frac{12}{36kg}=\frac{1}{3}kg$
$\therefore$ weight of $75$ books $=\frac{1}{3}\times 75=25kg$