alleryپائپ 12 اور 18 منٹوں میں ٹینک کو بھرتے ہیں۔ دونوں 6 منٹ تک چلتے ہیں۔ بھرا ہوا حصہ ہے۔
A5/6
B1/2
C3/4
D2/3
Answer & Solution
Correct answer: A. 5/6
مشترکہ شرح ہے 1/12 + 1/18 = 5/36، اور 6 منٹ دیتا ہے 30/36 = 5/6۔
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