The diagram shows the cross section of a part of a park bench.. It is made from a rectangle of length 32 cm and width 8 cm and a curved section. The curved section is made from two concentric arcs with a sector angle 125 degrees. The inner arc has radius 40 cm and the outer arc has radius 48 cm. Calculate the area of the cross section to the nearest square centimetre.
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Answered by
6
Answer:
area of sphere
and spstitute the values u will get the answer
Answered by
6
Answer:
1023.56
Step-by-step explanation:
1. find area of the rectangle
A= 8 x 32 = 256 cm2
2. find area of the complete circle using 48 as the radius
A= 3.14 x 48 x 48 = 7234.56 cm2
3. find the 125° area using the answer in no 2
125°/360°=A/7234.56
A=2512 cm2
4. find the area of the complete circle using 40cm as the radius
A= 3.14 x 40 x 40 = 5024 cm2
5. find the 125° area of circle using answer in no 4
125°/360°= A/5024
A= 1744.44cm2
6. find area of the shaded part
A shaded= 256 + (2512-1744.44) = 1023.56 cm2
[um idk if this is correct but this is how i think]
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