How long is the minute hand on a clock whose tip travels 15 cm from 1: 15 to 1: 30 to the nearest tenth?

The length of minute hand is 9.5 cm

Step-by-step explanation:

We are given the minute hand move from 1:15 to 1:30

Time for 1:30 to 1:30 = 15 minutes

Tip of minute hand move 15 cm in 15 minutes.

In 60 minutes = 360°

   In  1 minute = 6°

In 15 minutes = 90°

Formula:

Now we change into radian

L=15 cm

R = Length of minute hand.

Hence, The length of minute hand is 9.5 cm

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft