Question

In the minute hand of a clock is 3.5 cm long, find the distance covered by the tip of minute hand in 40 hours. (assume \pi = 22/7)

Answer 1

The length of the minute hand is equal to the radius of the circle the minute hand sweeps ⇒ 60 mins = πr^2

⇒ 20 mins = πr^/3

substituting the values r = 3.5 cm

⇒πr^/3 = 12.828 cm^2

hope it will help you friend

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Answer 2

Answer:

880cm distance will be covered in 40 hours.

Step-by-step explanation:

• In context to the given question, we have to find the distance covered by the minute hand.

Given,

Length of the minute hand = 3.5 cm = radius of circle

Total number of hours = 40

Solution,

we know that,

A minute hand completes one rotation in one hour

Distance covered in one hour = 2 π r = 2 x (22/7) x 3.5

⇒ 2 x 22 x 0.5 = 22 cm

Therefore, similarly

Distance covered in 40 hours = distance in one hour x 40

⇒ 22 x 40

⇒ 880 cm

therefore, 880cm distance will be covered in 40 hours.