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3 years ago

Please help with this too

Mathematics

1 answer:

vovikov84 [41]3 years ago

8 0

Answer:

Step-by-step 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

= $2*\frac{22}{7}*35*100$

= 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

$\frac{22}{7}*11*11*h=66\\\\\\h=\frac{66*7}{11*11*22}\\h=0.17 mm$

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How to do this question?

marta [7]

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If 2 and a partial sm sq are next to a 9cm sq then knowing 4*2=8 you can figure out that the other square is split as 1cm and 3cm(1+3=4), 3cm of which is lined up with the width (4cm)of another sm sq which would equal 7cm, these 2 sm sqs line up with the unknown sq whose sides would in turn also be 7cm.

A=l*w, 7*7=49

Answer:Area=49cm^2

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3 years ago

Kala is mailing packages. Each small package costs her $2.30 to send. Each large package costs her 2.90. How much will it cost h

lutik1710 [3]

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3 years ago

This semicircle has a diameter of 5 meters.

Ira Lisetskai [31]

Area of semicircle is given by:
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3 years ago

yo I need help asap would really appreciate, solve photo attached please also pls tell me how you did it

lilavasa [31]

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3 years ago

Please help with this too​

Please help with this too