Question

If the minute hand of the clock is 1.05m
long,find the rate at which its tip is moving in cm per minute

Answer 1

Answer:

660 cm/min

or

11 cm/sec

Step-by-step explanation:

Minute hand length = 1.05 m = 105 cm

It makes circular focus and length of hand is Radius.

The distance the tip travels (360°) to make one minute i.e. developing 60 sec = circumference of the circle.

Circumferrence of the Circle = 2πr

⇒ 2 x 22/7 x 105 = 44 x 15 = 660 cm

660 cm travel in one minute.

Hence the rate of tip movement = 660 cm/min

Or 11 cm/sec

Answer 2

660 CM per min

Step-by-step explanation:

Soln:

Radius = 1.05m

= 1.05 × 100

= 105 CM

circumference =2πr

=2× 22/7 × 105

= 660 CM