Question

A path 2m wide surrounds a circular pond of diameter 4cm. how many cubic meters of gravel are required to

Answer 1

please complete the question

Answer 2

Answer:

52.8 m³ of gravel are required to grave the path of 20 cm.  

Step-by-step explanation:

Given :  

Diameter of the circular pond = 40 m

Radius of the pond , r = d/2 = 20m/2 = 10m  

Thickness  = 2m

Depth, h  = 20 cm = 20/100 = 0.20 m

[1 cm = 1/100 m]  

The circular path can be viewed as a hollow cylinder.

Thickness  = External radius -  Internal radius

Thickness = R - r

2 = R - 20

2 + 20 = R

R = 22 m

Volume of the hollow cylinder = π(R² - r²)×h

= π(22² −20² )× 0.20

= 22/7 ( 484 - 400) × 0.2

= 22/7 × 84 × 0.2

= 22 × 12 × 0.2

= 52.8 m³

Hence, 52.8 m³ of gravel are required to grave the path.

HOPE THIS ANSWER WILL HELP YOU…...