Daniel rode his bicycle at a constant speed. After 40 minutes, he cycled 24\:km. How far did he cycle in 30 minutes?

**Answer Choices**

A. 12\:km

B. 14\;km

C. 16\:km

D. 18\:km

E. 20\;km

Daniel rode his bicycle at a constant speed. After 40 minutes, he cycled 24\:km. How far did he cycle in 30 minutes?

**Answer Choices**

A. 12\:km

B. 14\;km

C. 16\:km

D. 18\:km

E. 20\;km