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soldi70 [24.7K]
2 years ago
8

An5. A train travelled 720 km in 9 h. How farwould it travel in 11 h?​

Mathematics
2 answers:
ss7ja [257]2 years ago
4 0

Answer:

880 km

Step-by-step explanation:

To get from 9 to 11, we multiply 9 by 11/9, so the same must be done to 720 km to get the amount in 11 hours. 720 * 11/9 is equal to 880, so the train travels 880 km in 11 hours.

Citrus2011 [14]2 years ago
3 0

Answer:

The train would travel 880 km in 11 hours.

Step-by-step explanation:

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The dimensions of the box are 10 ft and 5 ft

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Step-by-step explanation:

A rectangle box with

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  • It needs to be made using 300 ft² of material
  • It has greatest volume

Surface area of a box without top (SA) = perimeter of base × height + area of the base

Volume of a box (V) = base area × height

Assume that the length of the side of the square base is x and the height of the box is y

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∴ The surface area of the box is 300 ft²

∵ Its base is a square of side length x ft

∴ Perimeter of the base = 4 × x = 4 x

∴ Area of the base = x²

∵ The height of the box = y ft

∵ SA = perimeter of base × height + area of the base

∵ SA = (4x)(y) + x²

∴ SA = 4xy + x²

∵ SA of the box = 300 ft²

- Equate the two expressions of SA

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∴ -\frac{3}{4}x^{2}=-75

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Substitute the value of x in the equation of y

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∵ x = 10

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∴ V=750-\frac{1}{4}(1000)

∴ V = 750 - 250

∴ V = 500 ft³

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Learn more:

You can learn more about the volume in brainly.com/question/6443737

#LearnwithBrainly

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