Question

Please help with all 3

Answer 1

Answer:

1, volume=23×9×5

=1035

2, volume=(1/2×5×4)×20

... =200

3.

Answer 2

Ah, volume!

1) Use the formula of rectangular prism: width x height x length

2) Use the formula of triangular prism: (Base x height x length) ÷ 2

3) Use the formula of cylinder: π x $radius^{2}$ x height

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1)

• width = 5 cm
• height = 9 cm
• length = 23 cm

width x height x length

= 5 x 9 x 23

= 1035

answer: 1035 cubic centimeters

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2)

• Base = 5 in
• height = 4 in
• length = 20 in

(Base x height x length) ÷ 2

= (5 x 4 x 20) ÷ 2

= 400 ÷ 2

= 200

answer: 200 cubic inches

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3)

• radius = 5/2 = 2.5 m
• height = 12 m

π x $radius^{2}$ x height

= π x $2.5^{2}$ x 12

= π x 6.25 x 12

= 75π

= 236 (rounded to neareast whole number)

answer: 236 cubic meters