Question

Following are the radius and height of cylinders,
(a) radius 3.1 cm
height 5.16 cm
(b) radius 5.4 cm
height 3.28 cm
(c) diameter 8 cm
height 6.5 cm
Find:
(i) The area of the circular base
(ii) The total surface area
(iii) The total circular surface area
(iv) The volume of the cylinder
(v) The total curved surface area
I beg u for help
plz help me please​

Answer 1

Answer:

I am weak in maths sorry I don't know

Step-by-step explanation:

bcoz I am still in 4th std now and I future I will help u

Answer 2

a) r= 3.1 cm

h = 5.16 cm

i) Area of circle = πr2

= 3.14 × (3.1)²

[ you can even take 22/7. but here question is in decimal so 3.14 will be easy.]

= 30.18 cm²

ii) total surface area = 2πr(r+h)

= 2×3.14×3.1(3.1+5.16)

= 18.84(8.26)

=155.62 cm²

iii) curve surface area= 2πrh

= 2×3.14×3.1×5.16

=100.45 cm²

iv) volume = πr²h

= 3.14×(3.1)²×5.16

= 3.14× 49.58

=155.68 cm³

I have solved one for you but better do other from your own. it will be good for you.

Have a nice day.