Question

Find the total surface area of a box having sides 15 cm, 10cm, 20cm.

Plz answer ​

Answer 1

$\huge\underline{\tt\red{Given}}$

Dimensions of a box -

• Length = 15 cm

• Breadth = 10 cm

• Height   = 20 cm

$\huge\underline{\tt\red{To~find~:-}}$

• Total surface area of box

$\huge\underline{\tt\red{Solution}}$

Formula to find total surface area -

$\boxed{\sf\green{{Total~surface~area~= 2(lb + bh + lh)}}}$

Put the given values -

= $\sf{2(15 \times 10 + 10 \times 20 + 20 \times 15)}$

= 2(150 + 200 +300)

= 2(650)

= 1300 ${cm}^{2}$

Total surface area of box = 1300 $\sf{cm^2}$