Question

b) The diameter of a circular coin is 1.14 cm. How many coins of the same size are required to place in a straight row to cover 2.85 m length (without leaving any gap between each coin)​

Answer 1

250.

Explanation:

if one coin covers 1.14 cm, then the required number can be calculated according the equality:

required_number=(given_length/given_diameter);

Then:

`number=(2.85*100)/(1.14) =(285)/(1.14) =250[coins].`

P.S. note, the given length is in [meter], the diameter is in [cm].