To the nearest ten, 30 cm
To the nearest ten, 320
To the nearest ten, 40 cm
The answer depends on what you wish to do with the estimate. If you wanted to divide by 25, I would suggest 175 since 175/25 = 7. If you wanted to add 315 then I would suggest 185 since 185 + 315 = 100 + 85 + 15 + 300 = 100 + 100 + 300 = 500.
315
315% = 31,500
Since there are 30.48 cm per foot, just multiply 315 by 30.48:315 feet x 30.48 cm = 9,601.2 cm
3.15m
To help you get started, 1 cm = 10 mm...
39.375
To the nearest ten, 320
Approximately 315 inches.
The answer is 124.02 inches (approx.). Inches and centimeters are both units of linear measurement. Inches are used in the imperial system whereas centimeters are used in the metric system. To convert from cm to inches, multiply the cm unit by 0.393701.
78.75
To the nearest ten, 40 cm
I estimate 15 cm.
There are 25.4 millimetres in one inch. Therefore, rounded to two decimal places, 315 millimetres is equal to 315/25.4 = 12.40 inches.
Let the other parallel side be x and then use Pythagoras to find diagonal lengths: Area: 0.5*(25+x)*18 = 315 sq cm Other parallel side: x = (315*2)/18 -25 = 10 cm Two right angle triangles can be formed with bases of 17.5 and heights of 18 cm Using Pythagoras: 17.5square+18squared = 630.25 and its sq rt is 25 to nearest integer Therefore the diagonal lengths are: 25 cm to the nearest whole number