20 refers to the amplification, 70 mm to the diameter of the main lens or mirror. Note: This diameter is by far the most important piece of information.
Chat with our AI personalities
300 mm x 15 cm x 20 mm = (30 x 15 x 2) cubic centimeters, or 900 cc.
The answer will depend on the units. 20 mm x 8 mm is quite a different size from 20 miles x 8 miles.
One cm contains 10 mm. So, 7 x 10 = 70 mm.
5 cm X 10 mm/cm = 50 mm 2 cm X 10 mm/cm = 20 mm 50 mm - 20 mm = 30 mm The answer is 30 mm.
0.20 x 70% = 14% answer = 14%