On a map 1cm represent 5km Find the area on the... - WAEC Mathematics 2016 Question
On a map, 1cm represent 5km. Find the area on the map that represents 100km2.
A
2cm2
B
4cm2
C
8cm2
D
8cm2
correct option: b
On a map, 1cm represents 5km. Then it follows that 1cm2 represents 25km2. Acm2 represents 100km2. By apparent cross-multiplication, 1cm2 x 100km2 = Acm2x 25km2
therefore A = \(\frac{100}{25}\) = 4cm2
therefore A = \(\frac{100}{25}\) = 4cm2
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