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Volume of jar equal to volume of cubiocalneck
=area of cross section ×lenth of cubiocalsection
=10×20=200cube cm
now total volume of jar = 200 ×2 = 400cm^3
Sorry thoda late ho gy...!!
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Volume of jar ≈ Volume of cubical neck
Area of cross section ≈ Length of Cubical section.
10 × 20 ≈ 200 cube centimeter
Total volume of jar
200 × 2 ≈ 400 cm³
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