Author |
Topic: ANALOG CLOCK I (Read 3728 times) |
|
JC...
Newbie
Gender: 
Posts: 1
|
 |
ANALOG CLOCK I
« on: Aug 19th, 2006, 8:55am » |
 Quote  Modify
|
PUZZLE:
ANALOG CLOCK I:
An analog clock reads 3:15. What is the angle between the minute hand and hour hand?
PROOF:
1.) The face of a clock (a full circle) is 360°
2.) There are 12 hours on the face of a clock
3.) -Therefore, each hour takes up 30°
4.) Each such hour has 60 minutes
5.) -Therefore, each minute is 0.5°
6.) At 3:15, the minute-hand sits exactly on the 3's position of the clock's face
7.) At 3:15, the hour-hand sits exactly 15 minutes past the 3's position
8.) -Therefore, the hour-hand is 7.5° (i.e., 15 x 0.5°) beyond the minute-hand's position.
ANSWER:
The angle formed between the hour and minute hands at 3:15, on an analog clock, is 7.5°.
Yes, definitely "easy". 
Regards,
JC... JC... JC... JC... JC... JC... JC... JC... JC... JC... JC... JC... JC... JC...
|
|
 IP Logged |
|
|
|
xlaurenee
Newbie
Posts: 1
|
 |
Re: ANALOG CLOCK I
« Reply #1 on: Nov 4th, 2007, 7:48am » |
Quote Modify
|
um, its an analogue clock.
doesnt that mean its digital?
therefore no hands or face with which to measure an angle..?
|
|
IP Logged |
|
|
|
towr
wu::riddles Moderator
Uberpuzzler
Some people are average, some are just mean.
Gender:
Posts: 13730
|
|
Re: ANALOG CLOCK I
« Reply #2 on: Nov 4th, 2007, 8:17am » |
Quote Modify
|
on Nov 4th, 2007, 7:48am, xlaurenee wrote:um, its an analogue clock.
doesnt that mean its digital? |
|
Analog means it's not digital.
|
|
IP Logged |
Wikipedia, Google, Mathworld, Integer sequence DB
|
|
|
|
RIDDLES SITE
WRITE MATH!
Home 
Help 
Search 
Members 
Login 
Register
Reply
Notify of replies
Send Topic
Print