Question

if 427.27% of a no. is added with one third (1/3) of
itself then it becomes 12920 then find 20% of
the original number
(a1 561 (6 423 (6, 374 (d) 510​

Answer 1

The option number is D is your answer

Answer 2

The correct option is a) 561

Step-by-step explanation:

Let x be the original number,

∵ 427.27% of x = $\frac{427.27\times x}{100}$

= 4.2727x

1/3 of x = $\frac{1}{3}\times x=\frac{x}{3}$

According to the question,

$4.2727x + \frac{x}{3}=12920$

$\frac{12.8181x + x}{3}=12920$

$\frac{13.8181x}{3}=12920$

$\implies x =\frac{12920\times 3}{13.8181}=\frac{38760}{13.8181}\approx 2805.02$

So, the unknown number would be 2805.02

20% of 3023.85 = $\frac{20\times 2805.02}{100}=\frac{2805.02}{5}\approx 561$

That is, option a) is correct.

#Learn more:

One third of a number added to itself gives 8. Find the number.

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