alleryਕਿਰਨ ਲਤਾ ਨਾਲੋਂ ਤਿੰਨ ਗੁਣਾ ਕੁਸ਼ਲ ਹੈ, ਜਿਸਨੂੰ ਇਕੱਲੇ 60 ਦਿਨਾਂ ਦੀ ਲੋੜ ਹੁੰਦੀ ਹੈ। ਇਕੱਠੇ ਉਨ੍ਹਾਂ ਨੂੰ ਲੋੜ ਹੈ
A18 ਦਿਨ
B12 ਦਿਨ
C15 ਦਿਨ
D20 ਦਿਨ
Answer & Solution
Correct answer: C. 15 ਦਿਨ
ਲਤਾ 1/60 ਅਤੇ ਕਿਰਨ 3/60 ਪ੍ਰਤੀ ਦਿਨ ਕਰਦੀ ਹੈ, ਕੁੱਲ 4/60 = 1/15, ਇਸ ਲਈ 15 ਦਿਨ।
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