1.

Raj and Rahul’s work efficiency is in the ratio 3∶ 2. If Raj can do a work in 12 days, in how many days will Rahul do the work alone?1). 8 days2). 9 days3). 15 days4). 18 days

Answer»

LET Rahul take ‘x’ days to do the WORK alone

Raj’s 1 DAY work = 1/12

Rahul’s 1 day work = 1/x

Ratio of their work efficiencies = (1/12)? (1/x) = 3? 2

⇒ x/12 = 3/2

⇒ x = (12 × 3)/2 = 18 days

∴ Rahul will do the work alone in 18 days


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