Question

give me ans very fast because I have exam

Answer 1

volume=pi r^2h=22/7×4.2/2×4.2/2×14
=11×4.2×4.2=11×17.64=194.04m^2
total surface area= 2pi r(r+h)
=2×22/7×2.1(2.1+14)
2×22×.3×16.1=212.52^2
cost=212.52×4=850.08
please mark it as a brainliest answer

Answer 2

d=4.2 m
r=2.1m
h=14
v. of cylinder=
$\pi \: r { \: }^{2} h$
22/7=2.1×2.1×4
=194.04m3
1m3=1000 liter
194.04=?
194.04×1000=194040 liter.
capacity=194040 l.
csa of cylinder=2πrh + 2πr(2πr is the area of top part)
=(2×22/7×2.1×14)+(2×22/7×2.1)
=184.8+13.2
=198 m2

cost of painting in 1m2= RS 4
cost of painting in 198 m2=
198×4= 792 RS