The base of a triangle is 15 cm and height is 12 cm. The height of another triangle of double the area having… · ABC26GN4444
Subject: General Aptitude · Chapter: Area
The base of a triangle is 15 cm and height is 12 cm. The height of another triangle of double the area having the base 20 cm is
(a)8 cm
(b)9 cm
(c)12.5 cm
(d)18 cm
Answer
Explanation
$\mathrm{A}_{1}=\left(\frac{1}{2} \times 15 \times 12\right) \mathrm{cm}^{2}=90 \mathrm{cm}^{2} . \mathrm{A}_{2}=2 \mathrm{A}_{1}=180 \mathrm{cm}^{2}$. $\therefore \quad \frac{1}{2} \times 20 \times h=180 \Leftrightarrow h=18 \mathrm{cm}$ 。
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