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Question

The scale on a map is 1:1000. The area of a lake on map is 1.4 centimeter square .calculate the actual area of the lake in square meters.

A
140
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B
160
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C
150
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D
120
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Solution

The correct option is A 140
Given area of lake =1.4 cm2=1.4×1 cm2
Using ratio 1:1000, we get-
1.4×1 cm2=1.4×(1000)2cm2
=1.4×1000000 cm2
As
1 m=100 cm
1m2=100×100 cm2
So 1.4×1000000 cm2=1.4×1000000100×100

=1.4×100=140 m2

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