Area MCQs

The area of two similar triangles are 12 cm2 and 48 cm2. If the height of the smaller one is 2.1 cm, then the corresponding height of the bigger one is :

A square and an equilateral triangle have equal perimeters. If the diagonal of the square is $$12\sqrt 2 $$ cm, then the area of the triangle is :

Which of the following figures has the longest perimeter ?

The perimeter of a circular field and a square field are equal. If the area of the square field is 12100 m2, the area of the circular field will be :

A toothed wheel of diameter 50 cm is attached to a smaller wheel of diameter 30 cm. How many revolutions will the smaller wheel make the larger one makes 15 revolutions ?

The perimeter of a square is equal to twice the perimeter of a rectangle of length 8 cm and breadth 7 cm. What is the circumference of a semi-circle whose diameter is equal to the side of the square ? (rounded off to two decimal places)

The ratio of the areas of the in-circle and the circum-circle of a square is :

If the circumference of a circle is decreased by 50% then the percentage of decrease in its area is :

A rectangular carpet has an area of 120 m2 and a perimeter of 46 metres. The length of its diagonal is :