Triangular flowerbed

A gardener plants one row of tulips around a triangular bed with sides of 5 m, 6 m, and 10 m. How many tulip bulbs does he need if he wants to plant 8 bulbs on a length of 1 m?

Correct answer:

n =  167

Step-by-step explanation:

$$\begin{gathered} a=5\text{m} \\ b=6\text{m} \\ c=10\text{m} \\ x=81\text{/m} \\ o=a+b+c=5+6+10=21\text{m} \\ n=o\cdot x-1=21\cdot 8-1=167 \end{gathered}$$

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