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ABC is an equilateral triangle of side 10 m and D is the midpoint of BC. Charges of `+100 C, -100 C " and +75 C` are placed at B, C and D respectively. What is the force experienced by `+ cC` charge placed at point A ?

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The correct Answer is:
`1.27 xx 10^(10)N,`" at a angle of" `45^(@)`" with the horiontal"
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