Subject: General Aptitude · Chapter: Area · Exam: 2011 · Marks: · Difficulty:
What is the area of $\triangle P Q R$, shown in $Q$. 162?
(a)$2 \sqrt{154}$ sq. cm
(b)$3 \sqrt{154}$ sq. cm
(c)$4 \sqrt{308} \mathrm{sq} . \mathrm{cm}$
(d)Cannot be determined
(e)None of these
Answer
Answer (as printed): B
Explanation
Area of $\triangle P Q R$ $=\frac{1}{2} \times Q R \times P Q=\left(\frac{1}{2} \times 2 \sqrt{154} \times 3\right) \mathrm{cm}^{2}=3 \sqrt{154} \mathrm{cm}^{2}$.