2 years ago

A rectangle is three times as long as it is wide.If it has a perimiter of 64 cm.find its area.

Mathematics

1 answer:

inessss [21]2 years ago

5 0

Answer:

i think you would just do 64+64+64=

Step-by-step explanation:

You might be interested in

A cylinder has diameter of 4ft and a height of 9ft. Explain whether halving the diameter has the same effect on the surface area

elena55 [62]

Answer:

See Below

Step-by-step explanation:

The surface area of cylinder is given by the formula:

$SA=2\pi r^2 + 2\pi r h$

Where

r is radius ( diameter is 4, so radius is 4/2 = 2)

h is height ( h = 9)

Lets find original surface are:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (9)\\SA=8\pi +36\pi\\SA=44\pi$

<u>Halving diameter:</u>

diameter would be 4/2 = 2, so radius would be 2/2 = 1

So, SA would be:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (1)^2 + 2\pi (1) (9)\\SA=2\pi +18\pi\\SA=20\pi$

<u>Halving height:</u>

Height is 9, halving would make it 9/2 = 4.5

Now, calculating new SA:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (4.5)\\SA=8\pi + 18\pi\\SA= 26\pi$

Original SA is $44\pi$ ,

Halving diameter makes it $20\pi$

Halving height makes it $26\pi$

So, halving diameter does not have same effect as halving height.

5 0

2 years ago

If bacteria took 20 minutes to double from 2 to 4, how many bacteria would there be after 1 hour

iren2701 [21]

4 * 2 * 2 * 2 = 32 bacteria

Hope it helps!

3 0

3 years ago

Read 2 more answers

Oxerville middle school is going to rent some vans to take students on a field trip. each van can hold 8 students. if a total of

Natalija [7]

11 vans would be needed

7 0

3 years ago

Line AB contains point A(4,5) and B(9,7). What is the slope of AB

True [87]

5/2

Your welcome
Your welcome

6 0

3 years ago

Read 2 more answers

At track practice,Sheila worked on the long jump. Her first jump measured 3 yards, 2 feet, 8 inches. Her second jump measured 2

jolli1 [7]

The length is 19.5 feet. this is because when you add the yards, it equals 15 feet. Next, add 1 + 2 feet from the first and second jump. 10+8 inches equal 1.5 feet. Next, add 15 feet+3 feet+1.5 feet to get 19.5 feet.

7 0

2 years ago