Question

hi guys pls help me with both of these questions

Answer 1

area of cube +area of hemisphere
5l^2+2pi(r^2)
500+50pi
657
cost =657×25/100
164.25



2)2pi(r)=40
3/4 of total area of circle is shaded area
pir^2=(140/22)^2×22/7=127.08
required area=95.31