3 years ago

I need help on this question

Mathematics

1 answer:

max2010maxim [7]3 years ago

4 0

Answer A
21 mm
7 x 3 = 21

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When you find the surface area of a cube, you ________ the length of the cube and multiply by 6.

ryzh [129]

Answer:

A-square

Step-by-step explanation:

example:

sa=(4cm)^2x6

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sa=96

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A kilogram of seawater contains 1/40 kg of salt. How much salt is there in two buckets of seawater, which contain 500 liters of

never [62]

Two buckets of seawater contain $13\frac{28}{40}$ kg of salt.

Step-by-step explanation:

Amount of salt in 1 kg water = $\frac{1}{40}\ kg$

It is given that;

1 liter = $1\frac{12}{125} = \frac{137}{125}\ kg$

500 liters = $500*\frac{137}{125} = \frac{68500}{125}$

500 liters = 548 kilogram

As,

1 kg of seawater = $\frac{1}{40}\ kg$ of salt

548 kilograms = $\frac{1}{40}*548$

548 kilograms = $13\frac{28}{40}$ kilograms of salt

Two buckets of seawater contain $13\frac{28}{40}$ kg of salt.

Keywords: unit rate, multiplication

Learn more about multiplication at:

#LearnwithBrainly

5 0

3 years ago