alleryایک کشتی جس میں پانی کی رفتار 15 کلومیٹر فی گھنٹہ ہے 40 کلومیٹر نیچے کی طرف جاتی ہے اور 5 کلومیٹر فی گھنٹہ کے کرنٹ کے ساتھ واپس آتی ہے۔ کل وقت؟
A8 گھنٹے
B7 گھنٹے
C5 گھنٹے
D6 گھنٹے
Answer & Solution
Correct answer: D. 6 گھنٹے
ڈاؤن اسٹریم 40 / 20 = 2 h اور upstream 40 / 10 = 4 h، کل 6 گھنٹے۔
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