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7. Two cones with same base radius 8 cm and height 15 cm are joined together along their bases. Find the surface area of the shape so formed.



Area of cone=pi×r(r+sqr root of h*2+r*2)
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L sq=r sq+h sq
l=√(r sq+h sq)
CSA of cone=pi*r*l
CSA of cone =427.42cm sq
surface area of figure =2*CSA of cone
surface area=854.84
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