The ratio of the area of a square to that of the square drawn on its diagonal is

$A$ wire is looped in the form of a circle of radius $28\, cm$. It is bent again into a square form. What will be the length of the diagonal of the largest square possible thus?

Height of an equilateral triangle is $6 \, cm$. Find its side? (in $cm$)

In a circle of radius $42\, cm,$ an arc subtends an angle of $72^{\circ}$ at the centre. The length of the arc is.....$cm$ (in $.8$)?

The area of the square inscribed in a circle of radius $8\, cm$ is......$cm^2$

$A$ can go round a circular path $8$ times in $40$ minutes. If the diameter of the circle is increased to $10$ times the original diameter,then the time required by $A$ to go round the new path once,travelling at the same speed as before,is (in $min$)