Question

The minute hand of a watch is 2.7cm long. How far does the tip move in 35 minutes? (Use π = 22/7)​

Answer 1

We know that l=rθ

Hence r=2.7cm

Now we know that minute hand make 1-a revolution in 1-hour.

Hence we can say that minute hand completes 360∘ in one hour.

So degrees completed in 1 min= 60

So degree complete in 40min = 60×40 =240∘

Hence θ=240∘

Radian measure = 180π×θ = 180π ×240 =4π/3

Now l=rθ

=1.5×4π/3

=0.5×4π

=2π

=2×3.14

=6.28cm

Hope it helps you out.

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