SOLUTION: please help me sir i am so confused to solve this question sir i have an part of tree its lenth of 6fit and breadth is12 inch and its height is also 12 inch please help me to calcu

Question 824731: please help me sir i am so confused to solve this question sir i have an part of tree its lenth of 6fit and breadth is12 inch and its height is also 12 inch please help me to calculate its total area in fit and its tearing cost is 60 rupees per fit?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
sounds like you want the surface area (SA) of the tree in feet
SA = (2 * pi * radius^2) + (2 * pi * radius * length)
We have the breadth equal to 12 inches and height equal to 12 inches, therefore the base of the tree is a circle whose radius is 12/2 inches = 6 inches = 0.5 feet
pi = 3.14159
now we can substitute into our SA equation
SA = (2 * 3.14159 * 0.5^2) + (2 * 3.14159 * 0.5 * 6)
SA = 1.570795 + 18.84954 = 20.420335 feet
Tearing cost = 20.420335 * 60 = 1225.2201 = 1225 rupees

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