Maths

A cylindrical birthday cake of radius 23cm and height 12cm is to be shared equally among 18 people at a party,the piece of cake was shaped as AOB to give 20 degrees,hence prove that.Also calculate the area of cylindrical cake.

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1. 1cake=360
When cake is divided into 18 part equally then
18part of cake=360/18=20degree
Therefore AngleAOB =20degree
Total surface area of cylinder= 2Pie r*h+2pie r^2
=2*22/7*23*12+2*22/7*23^2
=1734.85+3325.14
=5059.99

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