Perimeter and A...

$$80$$ students of the same height stand with both hands stretched all along the sides of a rectangular garden, each student covering a length of $$1.75$$ m. Then the perimeter of the garden is

Which figure has an area of $$20$$sq. units and a perimeter of $$18$$ units?

The given figure is made up of two rectangles. Find its total area.

If the outer and inner radii of a ring are $$10$$ cm and $$8$$ cm, then its area is nearly

A circular park, 42 m in diameter, has a path 3.5 m wide running around it on the outside. Find the cost of gravelling the path at Rs. 4 per $$m^2$$.

Circumference $$C$$ of the circular ring is:
where $$C_{outer}$$ and $$C_{inner}$$ denotes the circumference of outer and inner circles respectively.

Perimeter of a triangle is the sum of the lengths of all the _____ sides.

The shaded area enclosed between the two rings is called _____.

Find the area of the circular park of whose radius is $$4.5 m$$.

A circular ring is 5 cm wide. The difference of outer and inner radius is