6 percent Explanation
A=x^2 dA=2x dx divide both sides by A or x^2 dA/A=2 dx/x =2*0.03 =0.06 Thus percent error in A=6 percent
Neeraj buys an old piano for Rs. 6800 and spends Rs. 1200 to repair it. If he sells the piano for Rs. 8600, what is his gain percentage?
Rohan Batra buys an old scooter for Rs. 11700 and spends Rs. 1800 on its repairs. If he sells the scooter for Rs. 26000, what is his gain percentage?
The square ABCD has a side length of 1, and AEF is an equilateral triangle. What is the area of AEF?
A square lawn with side 100 m long has a circular flower bed in the centre. If the area of the lawn, excluding the flower bed is 8614 m^2, the radius of the circular flower bed is
