HOME

TREATISE:
. Quantum
Nodal Theory

ROMALDKIRK:
. Village
. Reservoirs

ESSAYS: COSMOLOGY
. Infinity
. Universe
. Dark Matter

ESSAYS: PHILOSOPHY
. Free Will
. Representation
. Conditionals
. Postscript

ESSAYS: ORGAN MUSIC
. Practising
. British Organs
. Hymn Playing
. Music Lovers

QUIZ QUESTIONS
. Quiz Archive

SERVICES
. Book Reviews

## Quiz of the Month (July 2006)

### Hector C. Parr

***

#### SOLUTION TO LAST MONTH'S QUIZ

1. 56.55 m2
2. 735.1 m2
3. 2456 m2

Notes.

```Q.3  The area consists of:
a semicircle of radius 30 m
+ two 30o sectors of radius 12 m
+ equilateral triangle ACD

= PI*302/2 + 2*PI*242/4 + 2*PI*122/12 + 36*sqr(3)
= 762*PI + 36*sqr(3)
= 2456.2```

#### THIS MONTH'S QUIZ

The hubs of both the supply spool and the take-up spool of an old reel-to-reel tape recorder have diameter 4 cm. A full reel of tape will play for one hour, and the initial outer diameter of the tape on the supply spool is 16 cm.

1. A full reel starts playing at 12 noon. What will be the diameter of the tape on the take-up spool at 12:21 pm ?

2. What will be the diameter of the tape on the supply spool at 12:55 pm ?

3. At what time will the tape on the supply spool have diameter 8 cm ?

***