Given:F = 40 cmd = 60 cml = ?D = ?We know that F = (D - d) / 2
Substitute F = 40 cm and d = 60 cm into the equation:40 = (D - 60) / 2
Solving for D:80 = D - 60D = 80 + 60D = 140 cm
Now, we can find l using the formula:l = d 2 + Fl = 60 2 + 40l = 120 + 40l = 160 cm
Therefore,l = 160 cmD = 140 cmF = 40 cm
Given:
F = 40 cm
d = 60 cm
l = ?
D = ?
We know that F = (D - d) / 2
Substitute F = 40 cm and d = 60 cm into the equation:
40 = (D - 60) / 2
Solving for D:
80 = D - 60
D = 80 + 60
D = 140 cm
Now, we can find l using the formula:
l = d 2 + F
l = 60 2 + 40
l = 120 + 40
l = 160 cm
Therefore,
l = 160 cm
D = 140 cm
F = 40 cm