When i started here, there were 500 employees. since then, we have added 35% more employees, so we now have a total of employees.

Number of employees when i initially started = 500
Percentage increase in the number of employees = 35%
Then
Increase in the number of employees = (35/100) * 500
                                                             = 35 * 5
                                                             = 175
So the total number of employees = 500 + 175
                                                       = 675
So now we have a total of 675 employees. I hope the procedure is not that complicated for you to understand. You can generally use this method for solving similar type of problems in future without requiring any help from anyone.

1. Lateral surface area: 7x4 = 28 inch^2

2. Total surface area: 1/2 x 3.5 x 4 x 5 = 35inch^2