Question

Raju, ramu and razi can do a piece of work in 20, 30 and 60 days respectively depending on their capacity of doing work. If raju is assisted by ramu and razi on every third day, then in how raju will complete the work?


a.12 days


b.15 days


c.16 days


d.18 days answer: b

Answer 1

Answer:

correct b

Step-by-step explanation:

see image for full explanation

Answer 2

Raju will complete the work in 15 days.

Step-by-step explanation:

Consider the provided information.

It is given that Raju can do a piece of work in 20 days.

Thus in 1 day he can do $\frac{1}{20}$ th part of the work.

In 2 days he can do =  $\frac{1}{20}\times2=\frac{1}{10}$ th part of the work.

On third day raju is assisted by ramu and razi.

Thus, the work done on the 3rd day is: $\frac{1}{20}+\frac{1}{30}+\frac{1}{60}=\frac{1}{10}$

Therefore in 3 days they can complete: $\frac{1}{10}+\frac{1}{10}=\frac{1}{5}$ th part of the work.

$\frac{1}{5}=20\%$

They can complete 20% of work in 3 days.

20%=3days

20%×5=3×5days

100%=15days

Hence, Raju will complete the work in 15 days.

#Learn more

Working 8 hours per day , kamla can embroider a saree in 18 days how man hours per day should she work so as to finish the work in 12 days

brainly.in/question/5174012