Multiple choice

x and y together can do a work in 8 days. If x alone can do it in 12 days then how many days can y alone do it? x और y मिलकर एक कार्य को 8 दिनों में करते है। यदि x अकेला उसी कार्य को 12 दिनों में करता है तो y अकेले कितने दिनों में करेगा?

  1. 30 days 30 दिन

  2. 24 days 24 दिन

  3. 26 days 26 दिन

  4. 28 days 28 दिन

  5. None of these इनमें से कोई नहीं
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

x + y together do work in 8 days, so their combined rate = 1/8 work per day. x alone takes 12 days, so x's rate = 1/12 work per day. y's rate = combined rate - x's rate = 1/8 - 1/12 = (3-2)/24 = 1/24. So y alone takes 24 days.

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