Question

find the total surface area of a closed cardboard box of length 0.5 m breadth 25 cm and height 15 CM

Answer 1

Given :-

• Length of cardboard (l) = 0.5m
• Breadth of cardboard (b) = 25cm = 0.25m
• Height of cardboard (h) = 15cm = 0.15m

To find :-

• Total surface area of cardboard

Solution :-

As we know that

Area of cardboard = 2(lb + bh + lh)

➭ 2(0.5 × 0.25 + 0.25 × 0.15 + 0.5 × 0.15)

➭ 2(0.125 + 0.0375 + 0.075)

➭ 2 × 0.2375

➭ 0.475 m²

Hence,

• Total surface area of closed cardboard is 0.475m²