Answer:
The cost of 10 ice-cream cones is 40 dollars.
Step-by-step Step-by-step explanation:
Here we have given that the cost of 5 ice-creams cone is 20 dollars. So, finding the cost of 1 ice-cream cone.
![:\implies{\tt{Cost \: of \: 1 = 20 / 5}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/4tfk4oefe76b4y776ux101929i1f24uays.png)
![:\implies{\tt{Cost \: of \: 1 = (20)/(5)}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/lbetfdngk03nsq6ml6sii753l5z3t31ga4.png)
![:\implies{\tt{Cost \: of \: 1 = \cancel{(20)/(5)}}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/qooqzxdv6u9olctws3jab1ecskm3w7v3ua.png)
![:\implies{\tt{Cost \: of \: 1 = \$4}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/tidp2r3qhe6se6g2zwmp77ewyyvqaawtyb.png)
Hence, the cost of 1 ice-cream cone is 4 dollars.
Now, we know the cost of 1 ice-cream cone. Thus, finding the cost of 10 ice-cream cones.
![:\implies{\tt{Cost \: of \: 1 = \$4}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/tidp2r3qhe6se6g2zwmp77ewyyvqaawtyb.png)
![:\implies{\tt{Cost \: of \: 10 = 4 * 10}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/ymacmcvqc1vzabqywmxcxst788s211fekq.png)
![:\implies{\tt{Cost \: of \: 10 = \$40}}](https://img.qammunity.org/2023/formulas/mathematics/high-school/vcm1xect014g7cp9l21uvaih9hodlxiayl.png)
Hence, the cost of 10 ice-cream cones is 40 dollars.
![\rule{300}{2.5}](https://img.qammunity.org/2023/formulas/mathematics/high-school/4wr5wvuxv3n1yp1b1sykhxf527peu2ltxm.png)