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Answer : 1 45 metric tonnes Explanation : Answer: A) 45 metric tonnes Explanation: 2 engines of former type for one hour consumes (2 x 24)/(6 x8) = 1 metric ton i.e. 3 engines of latter type consumes 1 ton for one hourHence 9 engines consumes 3 tons for one hourFor 15 hours it is 15 x 3 = 45 metric tonnes.

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