Question

the volume of a solid cube is 1100cm3 work out the surface area

Answer 1

Answer:

Volume of cube =(side)

3

=(40)

3

=64000cm

3

Volume of cylinder=πr

2

h=3.14×(20)

2

×50=62800cm

3

Surface area of cube=6(side)

2

=6(40)

2

=9600cm

2

Surface area of cylinder =2πrh=3.14×20×50=6280cm

2

So, total volume of figure=64000+62800=126800cm

3

And Total surface area of figure=9600+6280=15880cm

2