Question

Green clean refers to using cleaning methods and products with environmentally friendly ingredients and procedures which are designed to preserve human health and environmental quality. To preserve the environment and do in this manner, Rahul made a slide in a park which is situated in his society. One of its side walls has been painted in some color with a message ‘KEEP THE PARK GREEN & CLEAN’ (see figure). If the sides of the walls are 15m, 11m and 6m. Then give answer the questions by looking at the

Answer 1

Given :-

• The sides of the walls are 15m, 11m and 6m.

To Find :-

• Find the area painted in color ?

Solution :-

we know that, area of a ∆ with sides as a, b and c is ,

• Area = √[s*(s - a)(s - b)(s - c)] where s is semi - perimeter.
• s = (a + b + c)/2 .

so,

→ s = (15 + 11 + 6)/2

→ s = 32/2 = 16 cm.

then,

→ Area of ∆ = √[16 * (16 - 15) * (16 - 11) * (16 - 6)]

→ Area = √[16 * 1 * 5 * 10]

→ Area = √(4² * 5² * 2)

→ Area = 4 * 5√2

→ Area = 20√2 m². (Ans.)

Learn more :-

In ABC, AD is angle bisector,

angle BAC = 111 and AB+BD=AC find the value of angle ACB=?

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