Question

7. A cylinder is open at one end. The external
diameter is 10 cm and thickness 2 cm if the height
is 8cm (a) capacity of cylinder (b) volume of
metal used.​

Answer 1

Answer:

External radius=10/2=5cm,internal radius=5-2=3cm,h=8cm

(a) capacity of cylinder=volume of internal cylinder=πr²h=π×3×3×8=72πcm³

(b) volume of metal =volume of external cylinder-volume of internal cylinder

πR²h-πr²h=π×5×5×8-72π=200π-72π

128πcm³

Step-by-step explanation:

Answer 2

here is your solution, for future help , ask me