Question

3:4=15:(15+k) হলে x এর মান কত হবে?​

Answer 1

Given:

3 : 4 = 15 : (15+x) হলে x এর মান কত হবে?​

Write the value of x if 3 : 4 = 15 : (15 + x)​

To find:

The value of x

Solution:

We have,

3 : 4 = 15 : (15 + x)

$\implies \frac{3}{4} = \frac{15}{15 \:+\: x}$

on cross-multiplying, we get

$\implies 3(15 \:+\:x) = 15 \times 4$

on solving the equations on both sides, we get

$\implies 45 \:+\:3x = 60$

taking 45 on the RHS

$\implies 3x = 60 - 45$

$\implies 3x = 15$

$\implies \bold{x = 5}$

Thus, the value of x is → 5.

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