A square piece of cardboard with sides 25cm has a small square of side 2.5cm cut out from each corner.The remaining flaps are turned so as to make a box 2.5cm deep.find:(a) volume of the box.
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Answer:
Outer surface area of Box = 600 cm²
Step-by-step explanation:
a square piece of cardboard with sides 25 CM has a small square of side 2.5 CM cut out from each corner.
flaps are turned so as to make a box 2.5 cm deep.
=> Box is open from top with Depth/Height = 2.5 cm
and Length & Breadth = 25 - (2.5 + 2.5) = 20 cm
Box Dimension = 20 * 20 * 2.5 cm
Outer surface area of Box = 20 * 20 + 4 * 20 * 2.5
= 400 + 200
= 600 cm²
Other way
Area of Card board = 25 * 25 = 625 cm²
Areas of 4 square pieces cut = 4 * 2.5 * 2.5 = 25 cm²
Remaining area = 625 - 25 = 600 cm²
Step-by-step explanation:
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