Question

A cylindrical milk steel storage tank has 4.2 m as diameter and is 4.5 m high

(a) Find quantity of it can contain

(b) How much steel sheet was actually used to make this closed tank, if 1/7 of steel sheet was wasted in making the tank

Answer 1

r=2.1m
h=4.5m
a) vol. of cyli.= pir^2h
22/7*2.1*2.1*4.5
=22*0.3*2.1*4.5
=62.37m3
b)t.s.a=2 \pir r(r+h)
22/7*2*2.1(2.1+4.5)+1/7(2*22/7*2.1(2.1+4.5)=87.12+12.4457=99.5657m2

Answer 2

here is the answer ! hope it is clear and pls mark as brainliest answer if it helps !!