of the two square fields area of one is 1 hectare..., Area, General Mathematics

Question:Of the two square fields, the area of one is 1 hectare, while the other one is broader by 1%. The difference in their areas is :

A `100  m^2` 
B `101  m^2` 
C `200  m^2` 
D `201  m^2`

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+ AnswerD

+ ExplanationArea of first square` = 10000 sq.` metres.

Side of this square` = sqrt(10000) m = 201 m^2`

Side of the new square` = 101 m`

Difference in areas` = (101)^2 - (100)^2`

                         ` = 201 m^2`

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