First Mathematics Challenge - 2023 - 18 | Exact Science

18

The length of this rectangle is double its width. The perimeter of the rectangle is 48cm. What is the length of the rectangle?

A 6cm B 8cm C 12cm D 16cm E 24cm

Answer

D

SOLUTIOn

Again, this is about taking a basic unit, in this case the width of the rectangle. The length is then two widths and the whole perimeter, six widths. Six widths are equal to 48 cm so one width must be 8 cm and the length 16 cm, answer D.

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