Question

A field is in circular shape whose circumference is 220 m. Outside of the field, a road around it is
constructed. If circumference of the road is 308 m, find the width of the road.​

Answer 1

Answer:

10 m2

Step-by-step explanation:

(i) Length = 24.5 m

Breadth = 18 m

∴ Area of the rectangle = Length × Breadth

= 24.5 m × 18 m

= 441 m2

(ii) Length = 12.5 m

Breadth = 8 dm = (8 × 10) = 80 cm = 0.8 m [since 1 dm = 10 cm and 1 m = 100 cm]

∴ Area of the rectangle = Length × Breadth

= 12.5 m × 0.8 m

= 10 m2

Answer 2

answer = 44m.

Step-by-step explanation:

r1 = 2πr1

r2= 2πr2

2πr1 = 2 * π * r1

220 = 2*πr1

110/π = r1

2πr2 = 2πr2

308 = 2πr2

154/π = r2

r2 - r1 = 154/π - 110/π

= 44 m.

Width of the road = 44 m.