177k views
5 votes
Please help with this too​

Please help with this too​-example-1

1 Answer

4 votes

Answer:

Explanation:

Garden roller is in the shape of cylinder.

So, one revolution = Curved surface area of the cylinder

diameter = 70 cm

radius = 70/2 = 35 cm

h = 100 cm

Curved surface area of the cylinder = 2πrh

=
2*(22)/(7)*35*100

= 22000 square cm

Area covered in 15 revolutions = 15 * 22000

= 330000 square cm

2) Coin

diameter = 22 mm

r = 22/2 = 11 mm

Volume of coin = 66 mm

πr²h = 66


(22)/(7)*11*11*h=66\\\\\\h=(66*7)/(11*11*22)\\h=0.17 mm

User Tayllan
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories