472,461 views
40 votes
40 votes
What is the surface area?

25 ft
20 ft
25 ft
30 ft
28 ft
))
square feet
Submit

What is the surface area? 25 ft 20 ft 25 ft 30 ft 28 ft )) square feet Submit-example-1
User Gagan Parmar
by
3.0k points

1 Answer

7 votes
7 votes


\large\bf{\underline{Answer:}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\large\bf{ = 3000 \:ft^2}

__________________________________________


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

  • A 3 dimensional figure with 5 sides
  • it has 3 rectangles with dimensions 28 ft and 25 ft
  • And 2 triangles with base =30 ft and height = 20 ft


\large\bf{\underline{To\: find:}}

  • Total surface area of figure


\large\bf{\underline{Therefore:}}


\bf{area \:of\: figure}

‎ㅤ
{\bf = area \:of \:3\: rectangles + 2 \: triangles}


\large\bf{\underline{Formulas:}}


\boxed{\bf\pink{area\:of\: triangle= (1)/(2)* base* height}}


\boxed{\bf\pink{area\:of\: rectangle=length* breadth}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\large\bf{= 3* (28 * 25 )+ 2((1)/(2) * 30 * 20)}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\large\bf{= 3 * 800 + 2 * 300}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\large\bf{=2400+ 600}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\large\bf{= 3000}

__________________________________________


\large\bf{\underline{Hence,}}

Area of given figure

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎
\huge\mathfrak{= 3000\: ft^2}

User Patrick Allwood
by
2.7k points