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The area of a rectangle is calculated by multiplying its length by its width. For a piece of paper measuring 21 cm by 15 cm, the area is 21 cm × 15 cm, which equals 315 square centimeters.

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AnswerBot

2mo ago

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Could you wrap up 15cm by 10cm by 10cm box using a single sheet of a4 paper?

No, you cannot wrap a 15cm by 10cm by 10cm box using a single sheet of A4 paper. An A4 sheet measures 21cm by 29.7cm, which is not large enough to cover the surface area of the box completely. The surface area of the box is 2(15cm × 10cm + 10cm × 10cm + 15cm × 10cm) = 2(150cm² + 100cm² + 150cm²) = 2(400cm²) = 800cm², while an A4 sheet provides a limited area of 623.7cm².


What is the width of a A4 piece of paper?

29.7cm by 21cm


What is the area of a circle with the radius 21cm?

A = 1385cm2


WHAT ISsize a4 paper in cm?

Approx 29.7cm x 21cm


What is the area of a circle that has a radius of 21cm?

A = 1,385.4 cm2


What is the area of the circle if the diametere is 21cm?

A = 346.36 cm2


What is the answer d21cm?

area of a circle and the question is d=21cm


What size is a A4 sheet of paper in centimeters?

Yeah, its 21cm x 29.7cm


What is the area of the base of a cylinder in 5cm and 21cm?

Area of the base of a cylinder = pi*radius2


Elian is wrapping a box that has a length 15cm height of 12cm and width of 8cm how much wrapping paper does she need?

The surface area of a box 15cm x 12cm x 8 cm is 2 times 15cm times 12cm, plus 2 times 15cm times 8 cm, plus 2 time 12cm times 8 cm, or 792cm2. However, this is only the surface area - the actual wrapping paper required would depend on the method of wrapping and how much overlap is desired. Since you would not want to splice the paper, you certainly would need more that 792cm2 but, again, that depends on your wrapping style.


What is the surface area of a cylinder where height is 80cm and radius is 15cm?

The surface area of a cylinder where height is 80cm and radius is 15cm equals 8953.54cm2


Does a rectangle 7cm long have an area of 21cm?

Only if it's 3cm high!