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30 April, 12:36

Sally travels to work each day. she travels 12 km east from home to main road. sally then travels 9 km north on the main road to work. if the council was to put a direct road from sally's house to work, how much shorter would her journey be?

a. 6 km

b. 7.94 km

c. 11.06 km

d. 15 km

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  1. 30 April, 16:07
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    This way Sally travels 12+9=21 kilometers.

    If there was a direct way she could go to work, that way would have been 15 km (because her way to work forms a right-angled triangle).

    Therefore her journey would be 21-15=6 km shorter. Choice A.
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