Question

The
diameter of circular gorden is
42 am. There is a
3.sm wide road
around
the garden find the area of the
road.​

Answer 1

Answer:

Diameter of the circular garden is 42 m. … [Given]  ∴ Radius of the circular garden (r) = 42/2 = 21 m  Width of the road = 3.5 m …[Given]  Radius of the outer circle (R) = radius (r) + width of the road  = 21 + 3.5 = 24.5 m  Area of the road = area of outer circle – area of circular garden  = πR2 – πr2  = π(R2 – r2) = (22/7) [(24.5)2 – (21)2]  = (22/7) (24.5 + 21) (24.5 – 21) ...[∵ a2 - b2 = (a + b)(a - b)]  = (22/7) x 45.5 x 3.5 = 22 x 45.5 x 0.5  = 500.50 sq. m  ∴ The area of the road is 500.50 sq. m.Read more on Sarthaks.com - https://www.sarthaks.com/856443/diameter-of-the-circular-garden-there-is-wide-road-around-the-garden-find-the-area-the-road?show=856460#a856460