Correct

秒立方米

/ miǎo lìfāngmǐ / 
Strokes

Example

As a Noun

cubic metre per second

1
Zhè
这
tiáo
条
hé
河
liúliáng
流量
dá
达
6  000
6,000
miǎo
秒
lìfāngmǐ
立方米
  
。

The river flows 6,000 cubic metres a second.