Queenmarvis101
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a uniform plank weighing 40 n and 14 m long is pivoted at a point of 5m from one end. a girl Weighing 25n sit on the plank 8 m from pivot. Determine where her elder sister whose weight is 70N must sit to balance the plank horizontally.
give solution with the aid of diagram
pls I need urgent help with this​

Sagot :

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