Q: Which object is about 30 cm long?

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30 feet = 914.4 cm

about a foot

Cricket bat

A small measures 15 cm .It is 15 cm long . It means 2 small ruler will be equal to 30 cm and 5 cm of 3rd ruler . It is 35 cm long .

30 cm = 11.8 inches, approx.

Related questions

45 cm.

30 feet = 914.4 cm

The same object that is 11.5 cm long

30 what cm's? 30 cm is 300 mm

The density of the object can be calculated using the formula: Density = Mass/Volume. Plugging in the values, Density = 30 grams / 10 cm^3 = 3 grams/cm^3. Therefore, the density of the object is 3 grams/cm^3.

30 cm

Nothing

about a foot

It is: 30*15*12 = 5400 cubic cm

The mirror equation for concave mirrors is 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. Since the object distance is 10 cm from the mirror and the radius of curvature is 30 cm, the focal length (f) is half the radius of curvature, which is 15 cm. Substituting the values, you can find the image distance (di) which is -20 cm (negative indicates a real image). The magnification can be calculated using M = -di/do, which in this case is -20/-10 = 2. This means the image is inverted and magnified by a factor of 2, located at a distance of 20 cm on the same side as the object from the mirror.

a computer moniter

Cricket bat