find the sum. 64 km 75 dam and 2km 7 hm 4dam. express Yoar answer in metres
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Fermentation occu 39. If a lens can converge the sun rays at a point 20 cm. away from its optical centre, the power of this lens is - (a) + 2D - 2D (c) + 5D (d) - 50 The radius of curvature of a converging mirror is 30 cm. At what distance
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h
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