smc-3123-50-Grids and scale drawings

Geometry, NAP-F2-29

This grid map shows the names of some places along a hiking track.

The distance between The Terrace and Karuah is about 40 km.

Which of these is closest to the distance from Rees to Janis along the track?

`text(30 km)`	`text(40 km)`	`text(50 km)`	`text(70 km)`

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`text(50 km)`

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`text(Using the distance of The Terrace to Rees as 40 km,)`

`text(the best estimate for Rees to Janis is closest to 50 km)`

`text(among the options.)`

A speed boat has a length of 640 cm.

How many centimetres of the real boat does one unit on the grid represent?

centimetres

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`40\ text(cm)`

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`text(Grid is 20 units wide, boat is 16 units wide.)`

`:.\ text(Length of 1 unit)`	`=640/16`
	`=40\ text(cm)`