15 is an exact number. It is a precise number.
8.43175853 feetWould that level of accuracy be justified by the precision of the measurement of 257 cm, or the conversion factor?
1 metre = 100 cm Therefore 15 meters = 15*100 = 1500 cm
The length of the diameter will be 30 cm if the radius is 15 cm.
4*15 cm = 60 cm
Without information on the precision of the measurement, the only thing that can be said is the max length is 115 cm.
14
15 cm + 7 cm = 22 cm
NO ! You cubed the 'cm' part OK. Why did you not also cube the '15' part ? Look at this: You have a cube, 15 cm on each side. What is its volume ? Length = 15 cm Width = 15 cm Height = 15 cm Volume = (Length) x (width) x (height) (15 cm) x (15 cm) x (15 cm) = 3,375 cm3 An even slightly better way to look at it: (15 cm)3 = (15)3 x (cm)3 = (3,375) (cm3)
15 cm = 5.90551 "15 cm = 5.90551 "15 cm = 5.90551 "15 cm = 5.90551 "15 cm = 5.90551 "15 cm = 5.90551 "
If that is the side length, just multiply 15 cm x 15 cm x 15 cm.
15 feet = 457 cm
8.43175853 feetWould that level of accuracy be justified by the precision of the measurement of 257 cm, or the conversion factor?
If the radius of a circle is 15 cm, the circumference is: 94.2 cm
1 metre = 100 cm Therefore 15 meters = 15*100 = 1500 cm
Use Pythagoras: diagonal² = length² + width² → diagonal² = (10 cm)² + (15 cm)² → diagonal = √(10² + 15²) cm = √325 cm = 5 √13 cm ≈ 18 cm
15 feet is 457.2 cm
IN either unit: it depends on the precision that you require.