3 years ago

I need help with this

Mathematics

1 answer:

andrey2020 [161]3 years ago

3 0

18a:16 18b:32 % means out of 100

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The classroom encyclopedia set seems to fill a shelf that is 24 in long each book is 3/4 in thick how many books are in the clas

gavmur [86]

24 divided by 3/4= 24*4/3=32books

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3 years ago

The total surface area of a cube is 294 cm ² work out the volume of the cube

mihalych1998 [28]

$\text{ Total Surface Area of cube, with Side $a$ is } 6a^2 \\ \text{ (six times the area of each face)} \\ 6a^2=294 \ m^2 \\ a^2= \frac{294}{6} \\ a^2=\frac{49\times6}{6} \\ a^2=49 \\ a=\sqrt{49} \\ a=7 \ m \\ \text{Volume of cube with Side $a$ is } a^3 \\ V= 7^3=49\times7 \\ \text{volume of the cube is } 343 \ m^3$