Two cones with same base radius 3 cm and height 4 cm are joined together
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along their bases. The surface area of the shape so formed is (Use Te = 3.14)
Answers
Answered by
1
Answer:
surface area of shape so formed = pie rl + pie rl
l= root 3^2+4^2
=root 9+16
= root 25
=5
=3.14×3×5+3.14×3×5
=15.90+15.90
=31.80
or 31.8 cm^2
Answered by
1
Answer:
150.72
Step-by-step explanation:
Tsa of a cone formula is pi r (l + r)
h=4
Pi=3.14
r=3
l2 = h2 + r2
=4x4 + 3x3
l2 = 16 + 9
l=sq root of 25
l=5
Using the formula
We have to add two cones to find the total surface area of the whole shape formed
2x 3.14 x 3 x (5+3)
=150.7cm2 is the tsa of the whole shape formed
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