Question

solve this question?

Answer 1

Hey friend, Harish here.

Here is your answer:

Given that,

There are 10 Triangular pieces . 5 pieces - Design 1 , 5 pieces - Design 2.

Sides of the triangular cloth is - 20cm, 50cm ,50cm.

$Area \ of \ triangular \ piece = \sqrt{s(s-a)(s-b)(s-c)}$

$S = \frac{Perimeter}{2}$

$Perimeter = 50+50+20 =120cm$

$So, \ S= \frac{120}{2} = 60$

$Therefore, \ Area = \sqrt{s(s-a)(s-b)(s-c)}$

$= \sqrt{(60) (60-50) (60-50)(60-20)}$

$= \sqrt{60(10)(10)(40)}$
 
$= 200\sqrt{6} cm^{2}$

So, Area of triangular piece = 200√6 cm².

Area of Design 1 needed for single umbrella = 5 × 200√6  = 1000√6 cm²

Area of Design 2 needed for singe umbrella = 5× 200√6 = 1000√6 cm²

∴Area of cloth need for 20 umbrellas = 20 × 1000√6 = 20,000 √6 cm²

Therefore 20,000√6 cm² cloth of each design is required to donate 20 umbrellas.

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Answer 2

Hi bro / sis,

The answer is 20,000√6 cm².

Hope this helps......