Answer:
The length of the BM is 6 unit.
Explanation:
Given : M is the centroid of the triangle. CM=7, PM=10, & BQ=18
To find : The value of BM ?
Solution :
Refer the attached figure below.
The centroid of a triangle is the point of intersection of its medians.
M is the centroid and the centroid divide the line in 1:2 ratio.
So, M divide BQ in 1:2 ratio and the total length of BQ is 18.
BM is one third of 18.
i.e.
![BM=(18)/(3)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/hwfm9zfjd14li4q0xswosacdw3fyg80o5b.png)
![BM=6](https://img.qammunity.org/2021/formulas/mathematics/middle-school/v5oasg3eem8uyxgcmm7gabwt9s5k6tmgvw.png)
Therefore, the length of the BM is 6 unit.