How many inches are in a metre - Optics

There are several ways to do this. The easiest way to explain this is to use ratios.


140 metres 3 metres
--------------- = ------------
4.5 inches x inches

Cross-multiplying we get 140 x = 3 x 4.5

Thus, x = 13.5/140

Good luck,

Paul

An inch is defined, strangely enough, as 2.54 cm. There are 100 cm in a metre. So 300cm is 3 metres.
Setting up the ratio, we have
1 inch = x inches
-------- -----------
2.54cm 300cm

Next, we cross multiply and get 2.54 x x = 300.
Dividing both sides by 2.54 to get x by itself.

I get 118.11". There are 12 inches in a foot, so we get 9 feet. Subtracting 108" (9x12) from the 118.11", we get 10.11" left over, so 3 metres is 9 feet 10.11 inches.

Good luck.

Paul

First, we need to determine the number of square units in the Imperial system. We can choose to do the calculation in feet or inches.

Let's do it in inches first. There are 12" in a foot, so we multiply 90,000 by 12 to get 1,080,000 linear inches. Multiplying this by 41.3", we get 44,604,000 square inches. We can convert this to square feet by dividing the number of square feet by the square inches in a square foot. Since a square foot is one foot by one foot, or 12 inches by 12 inches, there are 144 square inches in a square foot. Dividing our previous answer by 144 will give us 309,750 square feet.

Converting to square metres. An inch is defined as 2.54 centimetres ("cm"). Thus, there are 2.54cm x 2.54cm in a square inch or 6.4516cm^2 in a square inch.

Using the 44,604,000 square inches we got above, and multiplying this by 6.4516, we get 287,767,166.4 square cm. There are 100 cm in a metre, so there are 100cm x 100cm in a square metre. So there are 10,000 square centimetres in a square metre. I get 28,776.7 square metres.

There are 3.280839895 feet in a metre. So there are 3.280839895 x 3.280839895, or 10.76391042 square feet in a square metre. Taking 309,750 square feet and dividing by the 10.76391042 we get 28,776.7 square metres.

Good luck.

Paul

39.37 inches in a metric metre. You can just ask google this question and it will tell you.

One metre is about 39.37 inches. One square metre is about 1550 square inches.

One metre is about 39.37 inches. One inch is exactly 0.0254 metres.

54 inches by 74 inches is 3996 square inches, which is about 2.578 square metres.

A metre is about 39.37 inches.
One inch is exactly 0.0254 metres.

A foot is exactly 0.3048 metres and an inch is exactly 0.0254 metres. So, 30 cubic metres is about 1059 cubic feet or 1830712 cubic inches.