[npl] / trunk / NationalProblemLibrary / 270 / setDerivatives8RelatedRates / s2_8_7.pg Repository: Repository Listing bbplugincoursesdistsnplrochestersystemwww

# View of /trunk/NationalProblemLibrary/270/setDerivatives8RelatedRates/s2_8_7.pg

Sat Jun 3 13:50:11 2006 UTC (6 years, 11 months ago) by gage
File size: 1062 byte(s)
```Cleaned up code using the convert-functions.pl script
```

```    1 ## DESCRIPTION
2 ##  Calculus
3 ## ENDDESCRIPTION
4
5 ## KEYWORDS('Calculus','Derivatives')
6 ## Tagged by dgt5v
7
8 ## DBsubject('Calculus')
9 ## DBchapter('Differentiation')
10 ## DBsection('Related Rates')
11 ## Date('')
12 ## Author('')
13 ## Institution('')
14 ## TitleText1('')
15 ## EditionText1('')
16 ## AuthorText1('')
17 ## Section1('')
18 ## Problem1('')
19
20 DOCUMENT();        # This should be the first executable line in the problem.
21
23 "PG.pl",
24 "PGbasicmacros.pl",
25 "PGchoicemacros.pl",
27 "PGauxiliaryFunctions.pl"
28 );
29
30 TEXT(beginproblem());
32
33 \$a1 = random(10,20,1);
34 \$b1 = random(4,8,1);
35 \$c1 = random(30,50,5);
36 \$deriv1 = \$b1*\$a1/(\$a1-6);
37 TEXT(EV2(<<EOT));
38 A street light is at the top of a \$a1 ft tall pole. A woman 6 ft tall
39 walks away from the pole with a speed of \$b1 ft/sec along a straight path.
40 How fast is the tip of her shadow moving when she is \$c1 ft from the base of the
41 pole? \$BR
42 \{ans_rule(20) \}
43 EOT
44
45 \$ans = \$deriv1;
46 ANS(num_cmp(\$ans));
47
48 ENDDOCUMENT();        # This should be the last executable line in the problem.
```