Find the volume help me pls and thank
2 answers:
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Answer: Fernando has 29 books
Step-by-step explanation:
The prime numbers between 21 and 30 are 23 and 29.
hence, the possible number of books Fernando has 23 or 29.
After taking 4 books away, the total number of books left can be :-
23-4=19
Since, 19 is not a square number so he cannot be able to place the same number of books on each shelf of his bookcase.
So Fernado doesn't have 23 books.
29-4=25
Also,
Here, 25 is a square number so he will be able to place the same number of books on each shelf of his bookcase.
Therefore, Fernando has 29 books.
The diameter of the circle is the hypotenuse of the triangle
so find:
- the area of the triangle ((b*h)/2)
- the ray of the circle (d/2)
- the area of the circle r*r*π
- Now subtract from the area of the circle the area of the triangle