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Test # 110
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1. The fuel charge for running a train at uniform speed over a given distance of 80 km varies as the square of its speed and at 16 km/hr, it is found to be Its. 48 per hour. The fixed charges, ie salaries etc, amount to Rs 300 for every hour of run. What should be the most economical speed?

Quantitative Aptitude Test 110

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make short work of (something)
to finish something quickly
I made short work of the first report and started to work on the other report.
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