3. A closed rectangular water tank 10 m by 7 m by 6 m is to be painted all over. What is the conect formula will you use to solve the problema A.SA = 21w + 21h + 2hw C. SA 2w x 2wn x 21h B. SA=Ixwxh D.SA = 1 + w thi 4. A cube whose side measures 5 cm has a surface area of 150 cm, how can you find ils surface area?