Find the cost of painting a solid cone, whose radius is 12 cm and height is 5 cm, at the rate of Rs 210 per cm2
Answers
Answered by
3
Step-by-step explanation:
radius=12cm
height = 5 cm
slant height (l)=?
l² = r²+h²
l² = (12)²+(5)²
l² = 144+25
l² = 169
l = 13
area for painting the cone = πrl
=22/7×12×13
=3432/7
=490.28 cm²
1cm² = ₹210
490.28cm² =490.28×210
=₹102958.8
Similar questions