10. A rectangular block of lead, 10 cm by 5 cm by 6 cm, is melted and recast into a cuboid,
which is 10 cm high and 2 cm wide. Find the length of the cuboid.
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Answer:
Volume of rectangular block :
v = l × b × h
v = 10 × 5 × 6
v = 300 cm³
Volume of cuboid :
v = l × b × h
300 = l × 2 × 10
300 = 20 × l
l = 300/20
l=15(ANS)
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