Area Problems
If the radius of a circle is increased by 6%, find the percentage increase in its area.

15%
12.36%
8.39%
17%

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Area Problems
The length of a class room floor exceeds its breadth by 25 m. The area of the floor remains unchanged when the length is decreased by 10 m but the breadth is increased by 8 m. The area of the floor is

5100 sq.m
4442 sq.m
4870 sq.m
4987 sq.m

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Area Problems
If the area of an equilateral triangle is x and its perimeter is y, then which one of the following is correct?

y4 = 432 x2
y2 = 432 x2
None of these
y4 = 216 x2

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Area Problems
The cost of papering the four walls of a room is Rs. 48. Each one of length, breadth and height of another room is double that of this room.The cost of papering the walls of the new room is?

Rs. 384
Rs. 192
Rs. 298
Rs. 96

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