Answer:

Step-by-step explanation:
Let total number of students
Students went to the book fair:
Students went to book fair
Students who bought book:

Hence
of total students bought at least one book.
If C is between A and B, then, we can write the equation

Substitute the value of AB and the expressions for AC and CB in terms of x.

We can now solve for x.


Dividing by 5.








16=1/4 d+2.5
Where d is diameter of larger gear
16-2.5=1/4d
D=74 cm