1.

Kamal can do a work in 20 days. Bimal is 20% more efficient than Kamal. Suresh is 25% more efficient than Bimal. The number of days, Suresh will take to do the same piece of work, is1). 16 days2). 12 days3). \(15\frac{2}{3}\) days4). \(13\frac{1}{3}\) days

Answer»

Number of days Kamal TAKES to complete a WORK = 20 days

∴ In 1 day Kamal can do = 1/20 part of work

Given: Bimal is 20% more EFFICIENT than Kamal

∴ In 1 day Bimal can do = 1.2/20 part of work

Given: SURESH is 25% more efficient than Bimal

∴ In 1 day Suresh can do = $(\frac{{1.2\; \times \;1.25}}{{20}})$ part of work

∴ Suresh can do the complete work in $(\frac{{20}}{{1.2 \times 1.25}} = 13\frac{1}{3})$ days


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