zeeshan amir khan

Make a diagram let the foot of the ladder be x ft from the fence let the ladder reach y ft above the ground I see similar triangle so set up a ratio 8/x = y/(x+1) xy = 8x+8 y = (8x+8)/x let the length of the ladder be L L^2 = (x+1)^2 + y^2 = (x+1)^2 + [(8...

V = π r ² h = 1ft³ h = 1/π r ² SA = π r ² + 2 π r h = π r ² + 2 π r * 1/π r ² = π r ² + 2 / r SA ' = 2π r - 2 / r² = 0 2π r = 2 / r² r³ = 1/π r = 1/ ³√π ft h = 1/(π r ²) = 1/(π (1/ ³√π) ²) = ³√π ² / π = 1/ ³√π ft