Question

the length of arc traversed
by minutes hand of a watch 1 cm Long after 15 minutes is a
In:
a)π/100 m
b)π/200 m
c)π/2 m
d)π/50 m​
give me serious answers...otherwise I'll report..​

Answer 1

Explanation:

In 1 hour, minute hand completes one round means makes a circle.

Radius of the circle(r)=15cm

Circumference of circular clock=2πr

=2×3.14×15=94.2cm

Therefore, the tip of the minute hand moves 94.2cm in 1 hour.

In 60 minutes, the minute hand of a watch completes one revolution.

∴ In 40 minutes, the minute hand turns through of a revolution

∴θ=

3

2

(2π)=

3

4π

radians

r=1.5

∴l=rθ=1.5×

3

4π

=2π cm

=2(3.14)=6.28 cm