Question 70346
surface area of a cylinder with a 10m radius and a 12m height. 
 The formula for surface area = 2 × r × pi × L + 2 × pi × r^2. 
  where r= radius and  L= height
  
  Here  r = 10 m  and L= 12 m  , pi =3.14
  
  Substituting the values in the formula
   Surface area = 2* 10 *3.14 + 2*3.14*10 *10
                = 62.8 + 628
                = 690.8 sq m

    Surface area of the cylinder = 690.8 sq m