alleryایک پمپ 5 گھنٹوں میں ٹینک کو بھرتا ہے، لیکن لیک ہونے سے 6 گھنٹے لگتے ہیں۔ اکیلے رساو ہی اسے خالی کر دے گا۔
A30 گھنٹے
B11 گھنٹے
C25 گھنٹے
D20 گھنٹے
Answer & Solution
Correct answer: A. 30 گھنٹے
لیک کی شرح 1/5 - 1/6 = 1/30 فی گھنٹہ ہے، لہذا 30 گھنٹے خالی ہیں۔
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