請幫我譯2題英文數學題做中文,
同埋教我果條式,
要有解釋架!
第3題係列方程!
3題都唔要答案!
1)A semi-circle is formed by bending a wire of length 51.4cm. Find the diameter of the semi-circle. (Take 兀 equals 3.14)
2)An ice sphere of volume 5832cm3 is melted and made into a cube. What is the length of the cube?
3)Melody 的父親的年齡是她現在年齡的4 倍。4 年後,她父親的年齡是她年齡的 3 倍。Melody 現在的年齡是多少?