alleryਇੱਕ ਕਾਰ ਦੀ ਗਤੀ 5 ਕਿਲੋਮੀਟਰ/ਘੰਟਾ ਵਧਾਉਣ ਨਾਲ ਇਹ 60 ਕਿਲੋਮੀਟਰ ਦਾ ਰਸਤਾ 1 ਘੰਟਾ ਜਲਦੀ ਪੂਰਾ ਕਰ ਸਕਦੀ ਹੈ। ਇਸਦੀ ਅਸਲ ਗਤੀ ਕੀ ਸੀ?
A12 km/h
B15 km/h
C10 km/h
D20 km/h
Answer & Solution
Correct answer: B. 15 km/h
60/s - 60/(s+5) = 1 ਦਿੰਦਾ ਹੈ s(s+5) = 300, ਇਸ ਲਈ s = 15 km/h।
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