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Calculate this please I need help

Calculate This Please I Need Help class=

Sagot :

9514 1404 393

Answer:

  (40π +48) cm²

Step-by-step explanation:

The total area is the sum of the areas of a 12 cm circle, a 4 cm circle, and a 12 cm by 4 cm rectangle.

For a given diameter (d), the area of a circle is ...

  A = (π/4)d²

Then the area of the two circles is ...

  A = (π/4)(12 cm)² +(π/4)(4 cm)² = (π/4)(144 cm² +16 cm²) = 40π cm²

The area of the rectangle is ...

  A = LW

  A = (12 cm)(4 cm) = 48 cm²

Then the total area of the figure is ...

  total area = circle area + rectangle area

  total area = 40π cm² +48 cm²

  total area = (40π +48) cm²