2. a) Shyam can do P part of a piece of work in 2 days. How much work does he do in (i) 1 day (in3 days? b) Kiran can do part of a work in 6 days. How much work does he do in i) 1 day (ii) 4 days?
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Answer:
Ram can do a piece of work in 5 days
Sham can do the same in 10 days
Ram, Sham and Karan can do a together work in 2 days
Concept used:
Unitary Method
Calculation:
One day's work of Ram = 1/5
One day's work of Sham = 1/10
One day's work of Karan = [1/2 – (1/5 + 1/10)]
⇒ [1/2 – (2 + 1)/10]
⇒ (1/2 – 3/10)
⇒ (5 – 3)/10
⇒ 2/10 = 1/5
∴ Karan to do the work in 5 days.
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