Question

Pls tell fast........ I need this answer

Answer 1

Answer:

CSA of cone will be painted .

CSA of 1 cone =22/7×r×l

height =h=1m

radius =r=40/2=20cm

=(1/100)×20=0.2m

let slant height be l

l²=h²+r²=(1)²+(0.2)²=1+0.04=1.04

root l=root1.04=1.019=1.02

CSA of 1 cone =22/7×r×l

=3.14×0.2×1.02m²

=0.64046m²

CSA of 50 cones=50×0.64046=32.028m²

cost of painting 1m²=₹12

cost of painting 32.028m²=12×32.028=₹384.336

=₹384.34(approximately)

therefore, cost of painting of 50 cones=₹384.34