The radius of a wheel is $1.4$ decimetre. How many times does it revolve during a journey of $0.66$ km?

$ABCD$ is a trapezium with $AD$ and $BC$ as parallel sides. $E$ is a point on $BC$. The ratio of the area of $ABCD$ to that of $\Delta AED$ is

The lengths of the two parallel sides of a trapezium are $16 \ m$ and $20 \ m$ respectively. If its height is $10 \ m$,its area in square metres is:

The area of a circle is same as the area of a square. What is the ratio of the diameter of the circle and the diagonal of the square?

The perimeter of an isosceles triangle is $14 \ cm$. The ratio of the lateral side to the base is $5:4$. The area of the triangle is:

If '$x$' is the median (altitude) of an equilateral triangle,then its area is?