The answer is 4/1 you just have to divide 7 from both numbers and then you will get 4/1
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Heres the work g..........
Consider
.
Given:

To find:
The length of BC.
Solution:
We have,

We know that the corresponding parts of congruent triangles are congruent (CPCTC).
(CPCTC)

The length of BC is 5 m. Therefore, the correct option is A.