3 years ago

Length of a river 27km 7m 170cm 270mm

Mathematics

1 answer:

NeX [460]3 years ago

3 0

Set it up together and that's all you got to do

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The sum of two numbers is 65. The larger number is 23 more than the smaller number . What are the numbers ?

KiRa [710]

Let's represent the smaller number by x and the larger number x+23
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A spherical marble with a radius of 1 cm. has a mass of 10 grams. What is the density of the marble?

kow [346]

Density of any object of found by dividing its Mass by its Volume

So firstly we have to find the Volume

Volume of sphere = $\frac{4}{3} \pi r^{2}$

where r is radius

So lets find the Volume

Volume of spherical marble = $\frac{4}{3} \pi (1)^{2}$

= $\frac{4}{3} \pi$

Now mass = 10 grams

So density = Mass/Volume = $\frac{10}{\frac{4}{3} \pi}= \frac{30}{4\pi}$ rho

≈2.39 rho

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3 years ago