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Q.

The scale on a map is 1:20000. The area of a lake on the map is 1.6 square centimeters. Calculate the actual area of the lake.


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a

64 m2

b

64000 m2

c

640000000 m2

d

None of these 

answer is B.

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Detailed Solution

Using the ratio 1:20000 in 1.6, we get,
1.6×1 cm2 = 1.6×(20000)2                   =1.6×400000000
                  = 640000000 cm2                   = 64000000010000                   = 64000 m2
So, Option 2 is correct.
 
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