Question

The boundary of a mine is plotted on a scale of 1:2000. if a planimeter measures the plotted area as 58 cm2, the actual mine area in m2 is (a) 5800 (b) 11600 (c) 23200 (d) 29000

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21. A 20 m steel tape used in a mine survey is found to be 20 cm short when compared with a standard tape. If the measured volume of a dump using the tape is 4000 m3, its actual volume in m3 is

A. 3881

B. 3902

C. 3920

D. 4121

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22. A mine worker inhales normal air; whereas, the exhaled air contains 16.65% O2 and 3.83% CO2. The respiratory quotient of breathing for the worker is

A. 0.23The boundary of a mine is plotted on a scale of 1:2000. if a planimeter measures the plotted area as 58 cm2, the actual mine area in m2 is (a) 5800 (b) 11600 (c) 23200 (d) 29000