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Answer:
1) Using Parallelogram law of vector addition,
R²=A²+B²+2ABcosФ
R²=49+576+2×7×24×cos90 (∵cos90=0)
R=√625=25 N
2) R²=9+16+2×3×4×cos60
R²=25+12
R=√37
Hope it helps you :)
Answer:
first one option B
second one option A
I hope this helps u ☺️