​The surface area of a cuboid having length 6 cm, breadth 7 cm and height 8 cm is:

Correct option is C

​Given:
Length(l) = 6 cm, Breadth(b) = 7 cm, Height(h) = 8 cm

Formula Used: 

Surface Area of cuboid; 

​$$\text{Surface Area} = 2 \times (l \cdot b + b \cdot h + h \cdot l)$$​​

Solution: 

Substituting the values: 

​$$\text{Surface Area} = 2 \times (6 \times 7 + 7 \times 8 + 8 \times 6)$$

= $$2 \times (42 + 56 + 48) = 2 \times 146 = 292 \, \text{cm}^2.$$​​