A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:

A. 49 m2 B. 50 m2
C. 53.5 m2 D. 55 m2

• since we know that all surfaces will be wet except the topmost surface so we will subtract the area of the topmost surface...
  2(lb+bh+lh)-lb
  =2(bh+lh)+lb
  =49.
• 10 years agoHelpfull: Yes(1) No(1)