Mining Engineering > GATE 2023 > Reliability
The reliability function of a pump is given as R(t)=exp[-(t/1000)0.5], where t The reliability function of a pump is given as stands for time in years. If the pump comes with a six-month warranty, the number of years for the pump to attain a reliability of 0.9 is [rounded off to 2 decimal places]

Correct : 8.82

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