MCQ
${60} = \frac{\text{b}}{4}\sqrt{{4}\times{13}^{2}}$
- A$9.34$
- B$10.45$
- ✓$9.23$
- D$10$
✓
Answer
Correct option: C.
$9.23$
The given expression can be solved as shown below:
$\Rightarrow{60} = \frac{\text{b}}{4}\sqrt{{4}\times{13}^{2}}$
$\Rightarrow{60} = \frac{\text{b}}{4}\sqrt{{4}\times{169}}$
$\Rightarrow{60} = \frac{\text{b}}{4}\times\sqrt{676}$
$\Rightarrow{60} = \frac{\text{b}}{4}\times{26}$
$\Rightarrow{60} \times4 = {26}\text{ b}$
$\text{b} = \frac{240}{26} = \text{b} = 9.23$
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