He reads 1/11 book in 2/5 hour.
A whole book is 11/11 of a book.
Multiply by 11.
He reads 11/11 book in 11 * 2/5 hour.
He reads 1 book in 22/5 hour.
22/5 hour = 4.4 hour = 4 hours and 24 minutes
water in cylinder = 1.179π in³
<h3>Further explanation</h3>
Volume is a derivative quantity derived from the length
The unit of volume can be expressed in liters or milliliters or cubic meters
The volume of the cylinder
V = πr².h
the volume of ball
V= 4/3πr³
volume of cylinder
![\tt V=\pi.9^2.15=1215\pi](https://tex.z-dn.net/?f=%5Ctt%20V%3D%5Cpi.9%5E2.15%3D1215%5Cpi)
volume of the ball
![\tt V=\dfrac{4}{3}\pi.r^3\\\\V=\dfrac{4}{3}.\pi.3^3=36\pi](https://tex.z-dn.net/?f=%5Ctt%20V%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi.r%5E3%5C%5C%5C%5CV%3D%5Cdfrac%7B4%7D%7B3%7D.%5Cpi.3%5E3%3D36%5Cpi)
water in the cylinder
V cylinder - V ball
![\tt 1215\pi-36\pi=1179\pi](https://tex.z-dn.net/?f=%5Ctt%201215%5Cpi-36%5Cpi%3D1179%5Cpi)
Answer:
If two angles are vertical angles, then they are congruent.
Step-by-step explanation:
90 degrees........................................................................