Question

a rectangular strip of dimensioms 21cm ×7cm is rolled along the longer side .Find the volume of the solid thus generated​

Answer 1

Answer:

circumference =21 cm

radius=21/2# ............#=22/7

=(21*7)/(2*22)

=147/44

surface area= (22*147*147*7)/(7*44*44)

=245.6