What is the time required to punch 1500 cards of 45 column each at the rate of 9,000 punches per hour ?
Correct Answer: 7 hrs 30 min
Explanation:
Total number of cards = 1500
total columns = 45
so, total punches=1500 x 45 = 67500
for 1 hour if we make 9000 punches,
we require 67500/9000 = 7.5
so 7hours:30mins.
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