alleryਇੱਕ ਕਿਸ਼ਤੀ ਜਿਸਦੀ ਗਤੀ ਸਥਿਰ ਪਾਣੀ ਵਿੱਚ 15 ਕਿਲੋਮੀਟਰ/ਘੰਟਾ ਹੈ, 40 ਕਿਲੋਮੀਟਰ ਵਹਾਅ ਵੱਲ ਜਾਂਦੀ ਹੈ ਅਤੇ ਵਾਪਸ ਆਉਂਦੀ ਹੈ, ਜਿਸ ਵਿੱਚ ਕਰੰਟ 5 ਕਿਲੋਮੀਟਰ/ਘੰਟਾ ਹੈ। ਕੁੱਲ ਸਮਾਂ?
A8 ਘੰਟੇ
B7 ਘੰਟੇ
C5 ਘੰਟੇ
D6 ਘੰਟੇ
Answer & Solution
Correct answer: D. 6 ਘੰਟੇ
ਡਾਊਨਸਟ੍ਰੀਮ 40 / 20 = 2 h ਅਤੇ ਅੱਪਸਟ੍ਰੀਮ 40 / 10 = 4 h, ਕੁੱਲ 6 ਘੰਟੇ।
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