Aptitude - Area
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How do I solve Aptitude quiz problems based on "Area"?
You can easily solve Aptitude quiz problems based on "Area" by practising the given exercises, including shortcuts and tricks.
Let original length = x metres and original breadth = y metres.
Original area = (xy) m2.
|New length =||120||x||m||=||6||x||m.|
|New breadth =||120||y||m||=||6||y||m.|
|New Area =||6||x x||6||y||m2||=||36||xy||m2.|
The difference between the original area = xy and new-area 36/25 xy is
= (36/25)xy - xy
= xy(36/25 - 1)
= xy(11/25) or (11/25)xy
|Increase % =||11||xy x||1||x 100||%||= 44%.|
Video Explanation: https://youtu.be/I3jLjLPn1W4
Area of the park = (60 x 40) m2 = 2400 m2.
Area of the lawn = 2109 m2.
Area of the crossroads = (2400 - 2109) m2 = 291 m2.
Let the width of the road be x metres. Then,
60x + 40x - x2 = 291
x2 - 100x + 291 = 0
(x - 97)(x - 3) = 0
x = 3.
Video Explanation: https://youtu.be/R3CtrAKGxkc