Solution
In this case, the radius of the circle traced by the minute hand is 1.5 cm.
Circumference = 2πr = 2π(1.5) = 3π cm
The minute hand covers this distance in 60 minutes.
Let x be the distance covered by the tip of the minute hand in 40 minutes.
$$\dfrac{x}{3\pi\ }=\dfrac{40}{60}$$
x = 2π = 6.28 cm
Therefore, the tip of the minute hand moves a distance of 6.28 cm in 40 minutes.
The answer is option A.
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