Answer:
ABC
Step-by-step explanation:
50 meters
Explanation
you can easily solve this by using a rule of three.
Step 1
Let

x represents the length of the actual lawn
then

the proportion is the same, so
Step 2

so, the length is 50 meters
Answer:
a)125970
b)95040
c)35640
Step-by-step explanation:
a) selecting 12 player from 20 players can be one in
= 
= 
= 
b) since each position has an identity permutations can be used so
Number of ways = 
= 
= 
= 
c) coach permutes 4 players for position other than centers in
ways and selects center in 3 ways
so, number of ways = 
=
=