What is 900MM x 575MM in feet?

Answer 1

900mm by 575mm is an area and is thus expressed in square feet not feet.

We can convert each measurement to feetand then multiply to calculate the area.

900mm = 90cm. There are 2.54cm in an inch.

Thus this is equal to 90/2.54 inches.

There are 12 inches in a foot thus this is equal to 90 / (2.54 * 12) feet.

Likewise 575mm = 57.5 / (2.54 * 12) feet.

Thus the area = (90 / (2.54 * 12)) * (57.5 / (2.54 * 12)) = 5.570 square feet (accurate to 3 decimal places only).

The above answer is perfectly correct. The following gets the same answer by a slightly different thinking process. As long as you understand the process and how to think through it you will be better able to solve like problems in the future.

The 900 x 575 part is easy. Just multiply 9 x 57500 = 517,500

There are 2.54 cm in an inch so this is 25.4 mm in an inch and 645.16 sq. mm. In a sq. in.

There are 12 inches in a foot and 144 sq. in. In a sq. ft.

Now if you are carrying the units along the 517,500 is in sq. mm. = 802.13 sq. in.

Finally 802.13 / 144 = 5.57 sq. ft.