A + B = 2 × 22 = 44 yr B + C = 2 × 21 = 42 yr C + A = 2 × 23= 46 yr On adding all three, 2 (A + B + C) = 44 + 42 + 46 = 132 ⇒ A + B + C = 66 ∴ A = (A + B + C) – (B + C) = 66 – 42 = 24 yr
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A man can do a piece of work in 30 hours. If he works with his son then the same piece of work is finished in 20 hours. If the son works alone he can do...
How will you write 3.78 hours in hours, minutes, and seconds?
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