Question

30 books = 45kg
45 books = ?

Answer 1

`\huge\boxed{\bf{45books = 67.5kg}}`

Explanation:

Given:-

• 30 books = 45kg

To find:-

• 45 books = ?

Ans:-

30books = 45kg

45books = y kg

Let's find 45 books (y)

`\sf \to (30)/(45) = (45)/(y)`

`\sf \to 45*45 = 30*y`

`\sf \to 2,025 = 30*y`

`\sf \to y = (2,025)/(30)`

`\sf \to y = 67.5kg`

~therefore 45books = 67.5kg

`\:`

`\huge\colorbox{red}{BlackPain}`

Answer 2

67.5 kg

Explanation:

To determine the weight of 45 books, we need to determine the weight of one book, using the equation (30 books = 45 kg). This can be done by dividing 30 to both sides of the equation. Therefore,

• ⇒ 30 books/30 = 45/30 kg
• ⇒ 1 book = 45/30 kg = 3/2 kg = 1.5 kg

We obtained the following equation;

• ⇒ 1 book = 1.5 kg

Now, multiply both sides by 45 to determine the weight of 45 books.

• ⇒ 1 book × 45 = 1.5 kg × 45
• ⇒ 45 books = 67.5 kg

Therefore, the weight of 45 books is 67.5 kg.