Question

The minute hand of a watch is 35cm long . How far does it tip move in 18min??
Plss give correct answers the best answer will be selected as the brainliest.....

Answer 1

in 60 min angle made by minute hand = 360

in 18 min angle = 6× 18 = 108 = 108 pie/180

So minute hand moves = 108 × 22× 35/7× 180

= 5× 22 × 108/180

= 110× 108/180 = 11880/180 = 66 cm

Answer 2

Given:

r = 35cm

To Find:

The distance tip will cover in 18 mins

Explanation:

In 60 mins, the angle made by the minute hand = 360°

1 min = 360°/60°

18 mins = (6×18)° = 108°

θ = 108°

θ = l/r

θ is the angle in radians

l = length of arc

r = radius

Hence θ = 108°

The relation between degree and radian nis given by

1° = (π/180° )radian

Now using this relation

θ = 108°

  = (108°×(π/180°))

  = 3/5π

l = rθ = 35 × (3π/5)

 = 35×(3/5)×(22/7)

 = 66

Length = 66cm

Answer = 66cm