Study the given bar graph and answer the question given follows:
The below bar graph shows the time taken by a boy alone and a girl alone to complete the respective projects. (in days)
Find total time taken by one boy and one girl together working on project P and project S.
Answer & explanation
Correct answer: option 3
Project P
Let the total work on Project P = LCM of 10 and 15 i.e. = 30
Time taken by them together to complete the work on Project P = \(\frac{30}{5}\) = 6 days
Project S
Let the total work on Project S = LCM of 20 and 30 i.e. = 60
Time taken by them together to complete the work on Project S = \(\frac{60}{5}\) = 12 days
Total time = 6 + 12 = 18 days