Question

6 books weigh 1.260 kg. How many books will weigh 3.150 kg?

Answer 1

Given weight of $6$ books is $1.260kg$

$⟹$ weight of each book is $\frac{1.260}{6}=0.210kg$

Let the number of books that will weigh $3.150kg$ be $x$

as we know that

weight of $x$ books is $0.210xkg$

$⟹0.210x=3.150$

$⟹x=\frac{3.150}{0.210}=15$

Number of books is $15$