2 Answers

Ravthiru · Answer 1 · 2021-10-24T19:18:01+0000

The second hand of a clock is 8 cm long what is the distance of the tip of the second hand travel in 10 minutes

Answer:

The distance travelled by tip of second hand in 10 minutes is 502.4 cm

Solution:

Length of second hand = 8 cm long

In one revolution it travels a circumference of a circle of which radius is 8 cm

The circumference of circle =
$2 \pi r$

$c = 2 * \pi * 8 = 16\pi$

We are aksed to find the distance of the tip of the second hand travel in 10 minutes

Second hand complete 1 revolution in 1 minute.

Therefore, in 10 minutes it revolves 10 revolution,

In 1 revolution tip of second covers = 16π

Hence distance travelled is given as:

$\rightarrow 16 \pi *10 = 160 \pi$

We know that π is a constant equals to 3.14

$\rightarrow 160 \pi = 160 * 3.14 = 502.4$

Thus the distance travelled by tip of second hand in 10 minutes is 502.4 cm

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