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BabaBlast [244]
3 years ago
5

The formula V = πr3 represents the volume V of a sphere with radius r. The radius of the Earth is approximately 6.3781 103. What

is the approximate volume of the Earth? Use 3.14 for π
Mathematics
1 answer:
AlladinOne [14]3 years ago
6 0

Answer:

radius \: of \: earth \:  = 6.4 \times  {10}^{6} \: m  \\ volume  \: of \: a \: sphere =  \frac{4}{3} \pi {r}^{3}  \\  =  \frac{4}{3}  \times 3.14 \times (6.4 \times  {10}^{6} ) ^{3}  \\  = 1.098 \times  {10}^{21}  \:  {m}^{3}  \\ or \\  = 1.098 \times  {10}^{12}  \:  {km}^{3}

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The Area of the platform is 33m²

Step-by-step explanation:

As the question says, the height of vertex from the base (D from AB) is 7m whereas the height of left vertex from the base (E from AB) is 4m

Thus it means the height of the Δ DCE (DX)= 7-4 ⇒3m

Since the platform is five-sided, the figure can be broken down into constituting parts

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Are of the figure= Area of ║ABCE+ area Δ DCE

Area of ║ABCE= breadth * height

= 6*4 ⇒24m ²

Area Δ DCE= ½*(base)(height)

Putting the value of base is 6m and height as 3m

Area Δ DCE= ½*6*3

=9m ²

Total area= 24+9= 33m ²

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3 years ago
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4 years ago
I<br> f the cost of 10 pens is rs 300,how much more is the cost of 2 dozens.
geniusboy [140]
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➷ Find the cost per pen by dividing:

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It costs rs 30 for one pen

1 dozen = 12

2 dozens = 24

Multiply the values:

24 x 30 = 720

The cost of 2 dozen pens is rs 720

However, as it is asking for 'how much more' you have to subtract:

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HELP ASAP!!! A man is 6 feet 2 inches tall. To find the height of a tree, the shadow of the man and the shadow of the tree were
Whitepunk [10]

1 ft = 12 inches

6 ft = 72 inches (multiply both sides by 6)

6 ft + 2 inches = 72+2 = 74 inches

6 ft, 2 inches = 74 inches

--------------------

1 ft = 12 inches

2 ft = 24 inches

2 ft + 1 in = 24+1 = 25 inches

2 ft, 1 in = 25 inches

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1 ft = 12 inches

3 ft = 36 inches

3 ft + 7 in = 36+7 = 43 inches

3 ft, 7 in = 43 inches

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(tree height)/(tree shadow) = (person height)/(person shadow)

x/43 = 74/25

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x = 3182/25

x = 127.28 inches

The tree is 127.28 inches tall which is the same as 10 ft, 7.28 inches

because 127/12 = 10 remainder 7, then we add on the 0.28 portion

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3 years ago
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