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OCR: b. The actual volumes of the hydrogen and oxygen tanks respectively, to the nearest m3 are 1450 m3 and 541 m3. What are the absolute and relative errors of the estimates in (a)? (See Chapter 2 for a discussion of these errors.) Solution: For the hydrogen tank: Absolute error = |estimate - true value| = |1480 - 1450| = 30 m3 Relative error = absolute error 30 x 1009%=2.196 true value x 1009% = 1450 For the oxygen tank: Absolute error = | 527 - 541|= 14 m3 Relative error = 14 x 1009% = 2.696 (See next card.)