Answer
Verified
395.7k+ views
Hint: Before solving this question we must know the value of square roots of 2 and 3 which will help us to solve the question very easily. Also, one must know what is a rational number as it will let us choose the appropriate options.
Complete step-by-step solution:
Now, before solving the question let us talk about numbers which are called rational numbers.
In the world of mathematics, the number which is called a rational number are those numbers that can be expressed as the quotient or fraction that is $\dfrac{p}{q}$ of two numbers where q cannot be equals to 0. Now, if q equals to 1, then it gives integer value. So, every integer is a rational number.
Now, in question, it is given that we have to find a number which is rational and also it lies between $\sqrt{2}$ and $\sqrt{3}$.
Now, first let see the options which are $\dfrac{3}{2}$, $\dfrac{4}{2}$, $\dfrac{5}{2}$ and 5 and all are rational numbers.
Now, what we will do is, we will find the values of $\dfrac{3}{2}$, $\dfrac{4}{2}$, $\dfrac{5}{2}$ and 5 in integral or decimal form
So, $\dfrac{3}{2}=1.5$ , $\dfrac{4}{2}=2$, $\dfrac{5}{2}=2.5$ and 5.
Now, we know that $\sqrt{2}$ approximately equals to 1.414, and $\sqrt{3}$ approximately equals 1.732.
Now, on seeing the values of $\sqrt{2}=1.414$ and $\sqrt{3}=1.732$ and comparing them with options which are 1.5 , 2 , 2.5 and 5 we see that only 1.5 is the number which is rational and lies between $\sqrt{2}$ and $\sqrt{3}$.
Hence, option ( a ) is correct.
Note: One must know the difference between rational and irrational number so that he can discard the options on the basis of definition and also one must know the values of $\sqrt{2}$ and $\sqrt{3}$ as it makes one solve the question easily and very fast.
Complete step-by-step solution:
Now, before solving the question let us talk about numbers which are called rational numbers.
In the world of mathematics, the number which is called a rational number are those numbers that can be expressed as the quotient or fraction that is $\dfrac{p}{q}$ of two numbers where q cannot be equals to 0. Now, if q equals to 1, then it gives integer value. So, every integer is a rational number.
Now, in question, it is given that we have to find a number which is rational and also it lies between $\sqrt{2}$ and $\sqrt{3}$.
Now, first let see the options which are $\dfrac{3}{2}$, $\dfrac{4}{2}$, $\dfrac{5}{2}$ and 5 and all are rational numbers.
Now, what we will do is, we will find the values of $\dfrac{3}{2}$, $\dfrac{4}{2}$, $\dfrac{5}{2}$ and 5 in integral or decimal form
So, $\dfrac{3}{2}=1.5$ , $\dfrac{4}{2}=2$, $\dfrac{5}{2}=2.5$ and 5.
Now, we know that $\sqrt{2}$ approximately equals to 1.414, and $\sqrt{3}$ approximately equals 1.732.
Now, on seeing the values of $\sqrt{2}=1.414$ and $\sqrt{3}=1.732$ and comparing them with options which are 1.5 , 2 , 2.5 and 5 we see that only 1.5 is the number which is rational and lies between $\sqrt{2}$ and $\sqrt{3}$.
Hence, option ( a ) is correct.
Note: One must know the difference between rational and irrational number so that he can discard the options on the basis of definition and also one must know the values of $\sqrt{2}$ and $\sqrt{3}$ as it makes one solve the question easily and very fast.
Recently Updated Pages
The branch of science which deals with nature and natural class 10 physics CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Define absolute refractive index of a medium
Find out what do the algal bloom and redtides sign class 10 biology CBSE
Prove that the function fleft x right xn is continuous class 12 maths CBSE
Find the values of other five trigonometric functions class 10 maths CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE