Question

a cube of side is 5cm it is melted to make a cylinder find the total surface area of cylinder​

Answer 1

Answer:

When a cube of 5 cm is melted to form cylinder its circumference will be 5 cm

So,circumference=5cm

or,2pie.r=5cm

2×22/7×r=5cm

r=5×7/2×22

r=35/44 cm

and,height=5 cm

C.S.A if cylinder=2pie.r.h+2pie.r

=2×22/7×35/44×5+5

=44/7×35/44×5+5

=5×5+5

= 30 cm²