**Hey Guys :)**

Here are the answers for numbers 2 and 4 from our Math Test today.

*** I didn't have time to copy the actual picture from our test because I was quite rushing***

**1)**

So, we were asked to find the Total Surface Area of the given

**Triangular Prism.****2)**

For this number, we were asked to find the Total Surface Area for the given

**Rectangular Prism.**If you still had problems with finding the T.S.A of a Rectangular or Triangular Prism, here are some links and videos to help you out!

Links!

Videos!

*If you spot any mistakes, fell free to tell me!*

*Cylinder Volume and Volume Problems*

**Chapter 7.3**

**Formula used : V = pi .r.r.h**

a ) v = pi.r.r.h

= 3.14 ( 5.5.23)

= 3.14 ( 575)

**= 1805.5 cm3**

b) V = pi.r.r.h

= 3.14 ( 14.14.12)

= 3.14( 2352)

**= 7385.28 cm 3**

c) V = pi.r.r.h

=3.14 (

**0.5**.**0****.5**.**1.5**) =3.14 (0.375)

**=1.1775 m3**

**Chapter 7.4**

I first tried to find out the volume of the First cylinder,

R= diameter divided by 2

=10 divided by 2

= 5cm 2

V = pi.r.r.h

=3.14 (5.5.30)

=3.14 (750)

=2355 cm 2

I then tried to find out the volume of the Second cylinder

**without**the**height**

Volume= 2335 cm2

height = pi.r.r

=3.14 (4.4)

=3.14 (16)

=50.24 cm2

I then divided the volume of the 2 cylinders to get the height for the second cylinder,

2335 divided by 50.24

**= 46.9 cm3**

**Video Post**

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ReplyDelete