Ritu drew a line segment of length 15 cm 4 mm. then she erased a portion of it. the remaining line segment measured 7 cm 6 mm. what is the length in mm of the erased line segment?.
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Answer:
length of the line originally=15.4cm
length of the line after erasing=7.6cm
hence length of line erased= 15.4 - 7.6= 7.8cm
=78mm
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