MCQ
If $\sqrt{7}=2.646$ then $\frac{1}{\sqrt{7}}=?$
- A0.375
- B0.378
- C0.441
- DNone of these.
✓
Answer
- 0.378
Solution:
$\frac{1}{\sqrt{7}}=\frac{1}{\sqrt{7}}\times\frac{\sqrt{7}}{\sqrt{7}}$
$=\frac{\sqrt{7}}{7}$
$=\frac{1}{7}\times\sqrt{7}$
$=\frac{1}{7}\times2.646$
$=0.378$
Hence, the correct option is (b).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The sides of a triangle are x, y and z. If x + y = 7m, y + z = 9m, and z + x = 8m, then area of the triangle is:
The measure of the angle between the coordinate axes is:
Write the correct answer in the following:
Decimal representation of a rational number cannot be.
Decimal representation of a rational number cannot be.
- Terminating.
- Non - terminating.
- Non - terminating repeating.
- Non - terminating non - repeating.
Which of the following statements is false?
For the frequency distribution given below, the adjusted frequency for the class 25-45 is:
| Class Interval | 5-10 | 10-15 | 15-25 | 25-45 | 45-75 |
| Frequency | 6 | 12 | 10 | 8 | 15 |
How much cloth 2.5m wide will be required to make a conical tent having base radius 7m and height 24m?
The mean of prime numbers between 30 and 40 is:
Short Answer Questions.
All the angles of a quadrilateral can be obtuse. Is this statement true? Give reasons for your answer.
All the angles of a quadrilateral can be obtuse. Is this statement true? Give reasons for your answer.
In Fig. if BP || CQ and AC = BC, then the measure of x is:
- 20º
- 25º
- 30º
- 35º
