At the start of the day, a decorator rested a 3 m ladder |

against a vertical wall so that the foot of the ladder was |

60 cm away from the base of the wall. |


During the day, the ladder slipped down the wall, causing |

the foot of the ladder to move 80 cm further away from the

base of the wall. |


How far down the wall, in centimetres, did the ladder slip? |

Give your answer to the nearest 1 cm. |