Question

find the total surface area of a closed cardboard box of length0.5m,breadth 25cm and height 15cm.

Answer 1

$\textbf {Hey there, here is the solution.}$

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STEP 1: Convert all to cm:

0.5m = 50 cm

25 cm = 25 cm

15 cm = 15 cm

Find surface area:

A close cardboard has 6 faces.

Top and Bottom = 2(50 x 25) = 2500 cm²

Front and Back = 2(25 x 15) = 750 cm²

Left and right = 2(50 x 15) = 1500 cm²

Total surface are = 2500 + 750 + 1500 = 4750 cm²

Answer: The total surface area = 4750 cm²

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⭐$\textbf {Cheers}$⭐

Answer 2

$\fbox { Heya !! }$    $\textbf { Given Data :- }$   length = 0.5 m   breadth = 25 cm    height = 15 cm     ⭐ we observe that length is in metres , so we must convert it into centimetres to solve the problem   ⭐ To convert m → cm multiply with 100   → 0.5 × 100   → 50 cm    Now , Coming to the question :- to find total surface of a Cuboid     $\fbox { TSA = 2 ( lb + bh + hl }$    → 2 [ (50 × 25) + ( 25 × 15 ) + ( 15 × 50 ) ]   → 2 [ 1250 + 375 + 750 ]   → 2 [ 2375 ]   → 4750 m^2    $\textbf {Answer :- 4750 m^2 }$   Glad if Helped...!!!