Question

Sarthak wants complete his design project to be able to graduate. He works on is project 20 minutes every 3 hours. If is project requires 10 hours of work, how long will it take to finish his project?

Answer 1

Answer:

Sarthak takes 90 hours to finish his project

Step-by-step explanation:

Sarthak projects require 10 hours of work

Thus, project requires $(\,10 \times 60=600\hspace{0.1cm}minutes)\,$ of work

Now, Sarthak works on his project 20 minutes every 3 hours

Let us consider 3 hours as 1 interval

Thus, work completed in 1 interval $=20\hspace{0.1cm}mins$ of work

Number of intervals $=\frac{600}{20}= 30\hspace{0.1cm}intervals$

Total Hours required $=30 \times 3=90\hspace{0.1cm}hours$

Hence, Sarthak takes 90 hours to finish his project

Answer 2

$=sarthak \: work \: \frac{20}{60} hr \: in \: \\ every \: 3hr \: on \: his \: project \\ =sarthak \: work \: 1hr \: in \: \: \\ every \: \frac{3}{20}hr \\ =sarthak \: work \: 10hr \: in \\ every \: 3 \div \frac{60}{20} \times 10 = \\ \: \: \: \: \: \: \: 90min \: on \: his \: project$