Question

If 20 drops fall in 76 seconds, how long will 8 drops take?

Answer 1

30.4 secs = 30secs

Explanation:

20 drops fall in 76s

Hence 1 drop is 76/20

Therefore 8 drops would be ;

76/20 × 8 = 30.4 secs

Answer 2

x =30.4 seconds

Explanation:

We can use ratios to solve

20 drops 8 drops

--------------- = ----------------

76 seconds x seconds

Using cross products

20x = 8*76

20x =608

Divide each side by 20

20x/20 = 608/20

x =30.4 seconds