Which of the following is the value of \\(\sqrt{0.49}+\frac{1}{\sqrt{25}})\\?
Answer and explanation
Correct answer: 0.9
Compute each term separately: \(\sqrt{0.49}=0.7\) and \(\frac{1}{\sqrt{25}}=\frac{1}{5}=0.2\). Their sum is \(0.7+0.2=0.9\). Option B (0.7) represents only \(\sqrt{0.49}\) and omits the second term, so it is incorrect. Exam tip: simplify square roots first (including decimals), then perform the arithmetic to avoid sign or omission errors.
Frequently asked questions
What is the correct answer to this question?
0.9
Why is this the correct answer?
Compute each term separately: \(\sqrt{0.49}=0.7\) and \(\frac{1}{\sqrt{25}}=\frac{1}{5}=0.2\). Their sum is \(0.7+0.2=0.9\). Option B (0.7) represents only \(\sqrt{0.49}\) and omits the second term, so it is incorrect. Exam tip: simplify square roots first (including decimals), then perform the arithmetic to avoid sign or omission errors.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Irrational numbers and real numbers.
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