Question

Diameter of the circular garden is 42 m. There is a 3.5 m wide road around the garden. Find the area of the road

Answer 1

Solution :

Diameter of the Circular Garden = d

d = 42 m

Radius ( r )= OB = d/2 = 42/2 = 21 m

width of the around the Garden (w)=3.5m

Radius of the larger circle ( R )

= OA

= r + w

R = 21 + 3.5 = 24.5 m

Area of the Road ( A ) = π( R+r )( R-r )

A = ( 22/7 ) ( 24.5 + 21 )( 24.5 - 21 )

A = ( 22/7 ) × 45.5 × 3.5

A = 22 × 45.5 × 0.5

A = 500.5 m²

Therefore ,

Area of the Road = A = 500.5 m²

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Answer 2

Answer:

500.50 sq m square yes or no