CAIE IGCSE Mathematics Extended E4.3.1 Draw and Interpret Scale Drawings Questions

Practise Extended CAIE IGCSE Mathematics by applying scale factors, converting lengths and checking units in diagrams.

Exam points

Interpret a scale drawing and convert between drawing and actual lengths.
Use a stated scale factor to calculate missing distances accurately.
Check units and proportional relationships in a scale diagram.

[Maximum number: 3]

A lake has an area of $3 \mathrm{~km}^{2}$ .
On a map the area of the lake is $18.75 \mathrm{~cm}^{2}$ .
Find the scale of the map in the form 1: n.

40000

B2 for 1 cm to 0.4 km or 2.5 cm to 1 km or 1600000000
or M2 for $\sqrt{\frac{3\times10^k}{18.75}}$ oe where k>5
or M1 for area conversion evidence listed in markscheme

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CAIE IGCSE Mathematics Extended E4.3.1 Draw and Interpret Scale Drawings Questions question 1