Which option gives the value of \(\sqrt{0.25}+\sqrt{0.04}\)?
Answer and explanation
Correct answer: 0.7
\(\sqrt{0.25}=0.5\) and \(\sqrt{0.04}=0.2\). Their sum is \(0.5+0.2=0.7\), so 0.7 is correct. Option C (0.54) reflects a common mistake: computing \(\sqrt{0.25+0.04}=\sqrt{0.29}\approx0.5385\) instead of summing the individual square roots. Exam tip: convert decimal squares to fractions (e.g. \(0.25=1/4,\;0.04=1/25\)) to recognize exact square roots quickly.
Frequently asked questions
What is the correct answer to this question?
0.7
Why is this the correct answer?
\(\sqrt{0.25}=0.5\) and \(\sqrt{0.04}=0.2\). Their sum is \(0.5+0.2=0.7\), so 0.7 is correct. Option C (0.54) reflects a common mistake: computing \(\sqrt{0.25+0.04}=\sqrt{0.29}\approx0.5385\) instead of summing the individual square roots. Exam tip: convert decimal squares to fractions (e.g. \(0.25=1/4,\;0.04=1/25\)) to recognize exact square roots quickly.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Irrational numbers and real numbers.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
