Challenge Level

Town | Radius | Area | Population (nearest hundred) |
---|---|---|---|

A | 1 | $\pi$ | 1000 |

B | 1.7 | $2.89 \pi$ | 2900 |

C | 4.5 | $20.25 \pi$ | 20000 |

D | 7 | $49 \pi$ | 49000 |

E | 2.4 | $5.76 \pi$ | 5800 |

F | 0.7 | $0.49 \pi$ | 500 |

If the diagram represented the populations using radius rather than area, the populations would be as follows:

A 1000

B 1700

C 4500

D 7000

E 2400

F 700

Most people's estimates should match more closely to the area figures than the radius ones.