Write a letter to the managing director of M/s garcha sons knit line Ludhiana placing an order for 1000 pieces of woollen sweaters that you wish to donate on the occasion of your birthday
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Δ=√s(s−a)(s−b)(s−c).
∴Δ=√6(6−3)(6−5)(6−4)cm2=6×3×1×2 sq.cm
=6 sq.cm
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