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… — Answer & Discussion

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, is

A16 days
B12 days
C$15\frac{2}{3}$ days
D$13\frac{1}{3}$ days

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Discussion 1

CCommunity01 Jul 2019

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