If the radii of end is the bucket are 5cm and 15 cm with 24cm High,then curved surface area is.

If the radii of end is the bucket are 5cm and 15 cm with 24cm High,the

1.	If the radii of end is the bucket are 5cm and 15 cm with 24cm High,then curved surface area is.
Answer» Height of bucket = 24 cm (h)Radius of upper end = 15 cm (R)Radius of lower end = 5 cm (r)Slant height of frustum{tex}l = \\sqrt { h ^ { 2 } + ( R - r ) ^ { 2 } }{/tex}{tex}\\Rightarrow \\quad l = \\sqrt { ( 24 ) ^ { 2 } + ( 15 - 5 ) ^ { 2 } } {/tex}{tex}\\Rightarrow \\quad l = \\sqrt { 576 + 100 }{/tex}{tex}\\Rightarrow \\quad l = \\sqrt { 676 }{/tex}\xa0= 26 cmTherefore, Surface area of bucket =\xa0{tex}\\pi l ( R + r ) {/tex}=\xa0{tex}\\pi \\times 26 ( 15 + 5 ) {/tex}{tex}= \\pi \\times 520{/tex}= 520{tex}\\pi{/tex}\xa0cm2