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IgorC [24]
2 years ago
14

Volume and Surface Area

Mathematics
1 answer:
stiv31 [10]2 years ago
8 0

1 )

volume = 20 \times 5 \times 8

volume = 800 \:  \:  {m}^{3}

surface \:  \: area \:  = 4 \times 20 \times 8

surface \: area \:  \:  = 640 \:  \:  {m}^{2}

_____________________________________________

2 )

v = 15 \times 3 \times 4

v = 180 \:  \:  {m}^{3}

s \: a \:  = 4 \times 15 \times 4

s \: a \:  = 240 \:  \:  {m}^{2}

_____________________________________________

3 )

v = ( \frac{1}{2}  \times 4 \times 5) \times 10 \\

v = 100 \:  \:  {m}^{3}

s \:  \: a = (10 \times 5) + (10 \times 4) + (10 \times  \sqrt{41} ) \\

s \: a \:  \:  = 50 + 40 + 10 \sqrt{41}

s \: a \:  \:  = 90 + 10 \sqrt{41}

_____________________________________________

4 )

v = ( \frac{1}{2}  \times 3 \times 4) \times 7 \\

v = 42 \:  \:   \: {m}^{3}

s \:  a \:  \:  = (3 \times 7) + (4 \times 7) + (5 \times 7)

s \: a \:  \:  = 21 + 28 + 35

s \: a \:  \:  = 84 \:  \:  \:  {m}^{2}

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