Accepted Answer
Using the angle of elevation formula, the distance between John and Fred from the building is 1.2m and 1.67m.What is the angle of elevation?The angular relationship between the horizontal plane and the line of sight for an object above the horizontal.The angle of elevation is the angle created between the line of sight and the horizontal. The angle created is an angle of elevation if the line of sight is upward from the horizontal line.You may calculate the angle of elevation, for instance, by standing on the ground and looking up at the peak of a mountain.So, the distance of the building from John and Fred is:Let, the height of the building be QR and the distance between the building and John and Fred be PR and SR.Now, we get the formula:Tanθ = QR/PRTanθ = QR/SRCalculate as follows:John's distance: Tanθ = QR/PR25 = 30/PRPR25 = 30PR = 30/25PR = 6/5PR = 1.2mFred's distance: Tanθ = QR/SR18 = 30/SRSR18 = 30SR = 30/18SR = 15/9SR = 1.67mTherefore, using the angle of elevation formula, the distance between John and Fred from the building is 1.2m and 1.67m.Know more about the angle of elevation here:https://brainly.com/question/27243378#SPJ13