Answer:
Radius = 2.5559cm
To the nearest tenth = 3cm
Explanation:
Volume of bottle = 160cm³
Height of bottle = 7.8cm
π = 3.14
Radius of bottle = r
Using the formula,
V = πr²h
160 = (3.14)(r)²(7.8)
160= 24.492r²
Dividing both sides by 24.492,
160/24.492 = r²
r² = 6.5327, which is approximately 6.533
Making r the subject,
r = √6.533
r = 2.5559, which is approximately 2.556
Round to the nearest tenth = 3
Therefore, the radius of the cylindrical bottle is 3cm.
Hope it helps. Happy New Month. Have a nice week.