Question

A running track is enclosed between two concentric circles of radii 40m and 37m. Find the area of the running track

Answer 1

Step-by-step explanation:

$\pi { {r }^{1} }^{2} - \pi { {r}^{2} }^{2}$

3.14×1600-3.14×1396

=5024-4298.66

=725.34

Answer 2

Answer:

Step-by-step explanation:

AnswEr :

• Area of Running Track Will Be :

⇒ Area = Area of Circle₁ - Area of Circle₂

⇒ Area = πR² - πr²

⇒ Area = π( R² - r² )

⇒ Area = π × [ (40²) - (37)² ]

⇒ Area = π × [ (40 + 37)(40 - 37) ]

⇒ Area = π × ( 77 × 3 )

⇒ Area =  

⇒ Area = 22 × 11 × 3

⇒ Area = 726 m²

⠀

∴ Area of the Track Will be 726 m².

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⋆ Terms Used Here :

1) a² - b² = (a + b)(a - b)

2)  

3) Two or more circles which have the same center point are know as Concentric Circle.