Perimeter and A...

A race track is in the form of  ring whose inner and outer circumstances are $$352\ meters$$ and $$396\ meters$$ respectively. Find the width of the track.

If the area of a parallelogram is $$144 \operatorname { cm } ^ { 2 }$$ and its base is $$9 cm$$. then its height is 

If the circumference of a circle is 88 cm, then the area of a circle (in sq. cm) is:

The area of a circle whose diameter is 1.4 cm is 

Find the circumference of the circles with the radius 14cm :$$(Take \ \pi = \frac{22}{7})$$ 

An ant is moving around a few food pieces of different shapes scattered on the floor. For which food-piece would the ant have to take a longer round? Remember, circumference of a circle can be obtained by using the expression $$c =2\pi r$$, where r is the radius of the circle.

Find the area of circle whose circumference is $$220cm$$

The area of parallelogram if the base is $$36cm$$  and height is $$45cm$$

The area of the concentric circles are $$962.5\ cm^{2}$$ and $$1368\ cm^{2}$$. Find the width of the ring formed by them. 

Find the radius of circle if its area is $$125\pi cm^2$$