Question

please clear my boubt i think correct answer is 2 no. option... ​

Answer 1

it'll option 4.
hope it helps u

Answer 2

Height of hemisphere=radius of hemisphere=l/2(d=l given)

Surface area of remaining=t.s.a of cube+ c.s.a of hemisphere -area of circle

6(l^2)+2pieR^2- pieR^2

6l^2+ pieR^2

6l^2+pie(l/2 whole square)

6l^2+piel^2/4

TAKE LCM

24l^2+pie l^2 while divided by 4

Take 1/4 l^2 common

1/4 l^2(24+pie)cm^2

Hope it is helpful