Question

if a roller of diameter 7.5 cm and height 22.5 cm than find the volume​

Answer 1

Answer:

265.17

Step-by-step explanation:

by apply the volume formula = πr^2h

π=22/7

r=7.5/2

h=22.5

it will be

22/7×7.5/2×22.5

where 2 and 22 get cancelled

it would be 11/7×7.5×22.5

the answer will be 265.17

Answer 2

GIVEN :-

• diameter of cylinder = 7.5 cm
• hieght of cylinder = 22.5 cm

TO FIND :-

• volume of cylinder

SOLUTION :-

$\implies \boxed{ \rm{volume \: of \: cylinder \: = \pi {r}^{2}h }}$

NOW FOR RADIUS :-

$\implies \boxed{ \rm{radius= \dfrac{diameter \: }{2} }}$

$\implies \rm{ radius \: = \dfrac{7.5}{2} } \: \: cm$

NOW VOLUME OF CYLINDER :-

$\implies \rm{ \pi \: ( \dfrac{7.5}{2} ) \: ( \dfrac{7.5}{2} ) (22.5)}$

$\implies \rm{ 3.14 \times \: ( \dfrac{7.5}{2} ) \: ( \dfrac{7.5}{2} ) (22.5)}$

$\implies \rm{ 3.14 \times \: 316.4}$

$\implies \rm{ 3.14 \times \: 316.4} = 993.5$

$\implies \boxed{ \boxed{ \rm{volume \: of \: cylinder \: =993.5 \: {cm}^{3} }}}$

OTHER INFORMATION :-

• The area of the circle of the cylinder is πr²

• The area of two circles will be 2πr²

• The radius ‘r’ of a cylinder is the radius of its base. Now, the area of the rectangle = length × breadth. 2πr is the circumference of the circle and h is the height. Area of the curved surface will be = 2πr × h = 2πrh So the area of the cylinder will be: 2πr² + 2πrh, or

• Total Surface Area of Cylinder = 2πr ( r + h )

• Where r is the radius and h is the height of the cylinder (the distance between the two bases).