Question

if the cost of 81 books is 9 kg . find the cost of 88 such books​

Answer 1

Correct question:-

• If the cost of 81 books is 9 rupees. find the cost of 88 such books.

Answer :-

• The cost of 88 such books is 9.8(Approx) rupees.

Step by step explanation:

To find :-

• The cost of 88 books.

Solution:

Given that,

• Cost of 81 books is 9 rupees.

Let the cost of 88 books be x

Here, Let's use :-

$\bigstar\bf \boxed{ \bf Product \: of \: means = Product \: of \: extremes}$

Applying this,

$\longrightarrow \bf 81 : 9 : :88 : x$

Here,

• Means = 9 & 88
• Extremes = 81 & x

Therefore :-

$\longrightarrow \bf 81 \times x = 88 \times 9 \\ \\ \\ \longrightarrow \bf81x = 792 \\ \\ \\ \longrightarrow \bf x = \cancel{\dfrac{792}{81} } \\ \\ \\\longrightarrow \bf \bigstar \: \boxed{ \bf x = 9.8 }$

Therefore, The cost of 88 such books is 9.8 (approx) rupees.