MHT CET 2026 Physics question
A cuboid has volume , where is the length of one side. When the length is measured by a meter scale of least count 1 mm, the relative percentage error in the measurement of its volume is 6.25%. Then the relative percentage error in measurement of its length and the value of the length is
Answer: (B)
Solution
, so the relative error in volume is . Given , we get . The least count of a metre scale is 1 mm = 0.1 cm, so $Δ l =
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