Question

there is slide in a park .One of its side walls has been painted in some colour with a message " Keep the park green and clean " . lf the side of the wall are 15 m, 11 m, and 6 m , find the area painted in colour ?​

Answer 1

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Answer 2

$\large{\bf \underline{{Given} :-}}$

• Length of first side = 15 metres
• Length of second side = 11 metres
• Length of third side = 6 metres

$\large{ \bf{ \underline{{To \: Find :-}}}}$

• The area of Painted wall.

$\bf{ \large{ \underline{Explanation :-}}}$

(a) Length of first side = 15 metres

(b) Length of second side = 11 metres

(c) Length of third side = 6 metres

Semi - Perimeter of wall,

$\large\Longrightarrow \: \frac{Side \: 1 \: + \: Side \: 2 \: + \: Side \: 3}{2}$

$\large{\Longrightarrow \: \frac{15 \: + \:11 \: + \: 6 }{2}}$

$\boxed{ \bold{\Longrightarrow 16 \: meters}}$

Using Heron's Formulae,

$\Longrightarrow \sqrt{s(s - a)(s - b)(s - b)} </p><p>$

$\normalsize{\Longrightarrow\sqrt{16(16 - 15)( 16 - 11)(16 - 6)} }$

$\Longrightarrow \sqrt{16 \times 1 \times 5 \times 10}$

$\Longrightarrow \sqrt{800}$

$\boxed{ \bold{\Longrightarrow 20\sqrt{2} \: \: \: \: {m}^{2} }}$

@Agamsain❤