Calculate the area and circumference of the following. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

Calculate the area of the shaded region in the following figure. Take $\mathrm{\pi }=\frac{22}{7}$

The diagram shows a plan for a rectangular garden with a circular pond. The part of the garden not covered by the pond is to be covered by grass. One bag of grass seed covers five square-meters of lawn. Calculate the number of bags of seed needed for the work to be done. Take $\mathrm{\pi }=\frac{22}{7}$

The diagram shows a road sign. If the triangle is to be painted white and the rest of the sign will be painted red, calculate the area covered by each colour to $1$ decimal place. Take $\mathrm{\pi }=\frac{22}{7}$