A golf ball is spherical with about $300 - 500$ dimples that help increase its velocity while in play. Golf balls are traditionally white but available in colours also. In the given figure, a golf bal

Question

A golf ball is spherical with about

300 - 500

dimples that help increase its velocity while in play. Golf balls are traditionally white but available in colours also. In the given figure, a golf ball has diameter

4.2

cm and the surface has

315

dimples (hemi-spherical) of radius

2

mm.

$Golf ball$

Based on the above, answer the following questions:

(i) Find the surface area of one such dimple.

[IMAGE_1]

Based on the above, answer the following questions:

(i) Find the surface area of one such dimple.

Accepted Answer

Step 1: Surface area of one dimple $= 2\pi r^2 = 2 	imes \frac{22}{7} 	imes (2)^2 = \frac{176}{7} = 25.1$ mm$^2$

Question

Solution