Area Problems
The ratio of the radii of two circle is 1:3 the radio of their areas is?

None of these
1:6
1:9
1:3

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Area Problems
The cross section of a canal is a trapezium in shape . If the canal is a trapezium in shape. If the canal is 10 meters wide at the top and 6 meters wide at bottom and the area of cross section is 640 sq. meters The depth of canal is?

40 meters
160 meters
384 meters
80 meters

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Area Problems
The length of a rectangle is twice its breadth. If its length is decreased half of the 10 cm and the breadth is increased by half of the 10 cm cm, the area of the rectangle is increased by 5 sq cm, more than 70 sq cm. Find the length of the rectangle.

40 cm
30 cm
21 cm
45 cm

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Area Problems
The length of a rectangle is twice its breadth. If its length is decreased by 5 cm and the breadth is increased by 5 cm, the area of the rectangle is increased by 75 cm 2 . Therefore , the length of the rectangle is?

40 cm
30 cm
50 cm
20 cm

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