The part of the lab that needs to be renovated is 5/6 sq. m. Which of the following number lines show the area of the lab to be renovated?
In the figure, there is a jogging track that has to be renovated. The cost of renovation is Rs. 15 per square meters. For the circular parts, the inner and outer radii are 6 m and 8 m respectively. Find the area highlighted in green colour (in square meters).