TCS Company Numerical Ability Time and Work

Two tanks A and B.A fills 1ltr/1hr B fills 10,20,30 per hour.If 1/4th of tank B takes 15 hrs to fill how much it time will to take to fill complete tank?

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TCS Other Question

at a clothing factory 130 shirts are inspected of these 4 shirts were found to have defects . based on this info , how many shirts are expected to be defective in a batch of 4000 shirts. avg of 20 numbers s zero.of them ,at most,how many may be greater than zero?