Question

Rajan can do a job in 60 days.
(i) How much of the job will he be able to finish in a day?
(ii) How much of the job will he be able to do in 36 days?
(iii) In how many days will he do of the job?​

Answer 1

Complete Question:

Rajan can do a job in 60 days.

(i) How much of the job will he be able to finish in a day?

(ii) How much of the job will he be able to do in 36 days?

(iii) In how many days will he do $\frac{2}{5} th$ of the job?​

Given:

Rajan can do a job in 60 days

To find:

(i) How much of the job will he be able to finish in a day?

(ii) How much of the job will he be able to do in 36 days?

(iii) In how many days will he do $\frac{2}{5} th$ of the job?​

Solution:

(i) Finding the amount of work done by Rajan in 1 day:

Using the unitary method,

If in 60 days, Rajan can do 1 job

Then in 1 day, Rajan will be able to do = $\frac{1}{60}$

Thus, he will be able to finish $\underline{\frac{1}{60}th}$ of the job in a day.

(ii) Finding the amount of work done by Rajan in 36 days:

Using the unitary method,

If in 1 day, Rajan does = $\frac{1}{60}$ of the job

Then in 36 days, Rajan will be able to do = $\frac{1}{60}\times 36$ = $\frac{3}{5}$

Thus, he will be able to finish $\underline{\frac{3}{5}th}$ of the job in 36 days.

(iii). Finding the no. of days Rajan will do $\frac{2}{5} th$ of the work:

Using the unitary method,

If Rajan does 1 job in 60 days

Then $\frac{2}{5} th$ of the job will be done by Rajan in = $\frac{2}{5}\times 60$ = $2 \times 12 = 24\:days$

Thus, he will be able to do $\bold{{\frac{2}{5} }th}$ of the job in 24 days.

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Answer 2

Answer:

here the solution is.....by using unitary method