Question

When water freezes, it's volume increases by 4%. What volume of water is required to make 221 cm^3 ( centimeter cube) of ice ?​

Answer 1

so 4% of volume increases in ice

so the volume of water to make 211 $cm^3$ ice is

$x + \frac{4x}{100} = 221cm^3$

$\frac{100x+4x}{100} = 221cm^3$

$104x = 22100m^3$

$x = \frac{22100 m^3}{104}$

$x = 212.5 cm^3$

answer is

${\huge{\red{212.5 \:cm^3}}}$