APFIVE Related Rates Shadow Problem
A person who is 5 feet tall is walking away from a street light that is 15 feet tall. The person is walking at a constant rate of 3 feet per second. When the person is 10 feet from the base of the street light, what is the rate at which the tip of the person’s shadow is moving away from the base of the street light, in feet per second?
A
$$\frac{9}{2}$$
B
$$3$$
C
$$6$$
D
$$\frac{15}{2}$$
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | dpaak0903 | 1 | 1 | 0m 00s | 100 |
| #2 | sgarv2513 | 1 | 1 | 0m 00s | 100 |
| #3 | aurorachris0601 | 1 | 1 | 2m 40s | -60 |
| #4 | suhanakochhar006 | 0 | 1 | 2m 04s | -134 |
| #5 | manyab1708 | 1 | 1 | 5m 16s | -216 |
| #6 | choiwonryeol | 1 | 2 | 9m 30s | -480 |
| #7 | fsfa.alsharif | 2 | 2 | 11m 51s | -511 |
| #8 | psak12 | 1 | 2 | 46m 38s | -2,708 |
Items per page:
10
1 – 8 of 8