Answer:
20 Blocks
Step-by-step explanation:
6 Minutes 4 Blocks
----------------- = -------------------
30 Minutes 20 Blocks
Because 6 was multiplied by 5 to get 30 minutes in total then 4 blocks need to be multiplied by 5 as well.
21 + 20 = 43
Total is 123, so divide by 43.
123/43 = 2.86 rounded to 3.
(females) 20 x 3 = 60 female lions