Question

The sum of 15% of a positive number and 10% of the same number is 70. What is twice of that number ?

Answer 1

25%=70
So 100%=280
Ans-560

Answer 2

Answer: Twice of the number is 560

Step-by-step explanation:

Let the number be x

Now as given in question sum of 15% of x and 10 % of x is 70

Therefore,

$15\% \text{ of } x + 10\% \text { of } x = 70\\\\\Rightarrow \dfrac{15}{100} \times x +\dfrac{10}{100} \times x=70\\\\\Rightarrow\dfrac{15x +10x}{100} =70\\\\\Rightarrow\dfrac{25x}{100} =70\\\\\Rightarrow\dfrac{x}{4} =70\\\\\Rightarrow x= 280$

Twice of the number is 2 x 280=560

Hence, twice of the number is 560