Sarthaks Test
0 votes
83 views
in Mathematics by (15.0k points)

Two persons could fit new windows in house in 3 days.

(i) One of the persons fell ill before the work started. How long would the job take now?

(ii) How many persons would be needed to fit the windows in one day?

1 Answer

0 votes
by (24.8k points)
selected by
 
Best answer

(i) Let the number of days required by 1 man to fit all the windows be x. The following table is obtained.

Number of persons21
Number of days3x

Lesser the number of persons, more will be the number of days required to fit all the windows. Hence, this is a case of inverse proportion. Therefore, 2 × 3 = 1× x

x = 6

Hence, the number of days taken by 1 man to fit all the windows is 6.

(ii) Let the number of persons required to fit all the windows in one day be y. The following table is formed.

Number of persons2y
Number of days31

Lesser the number of days, more will be the number of persons required to fit all the windows. Hence, this is a case of inverse proportion. Therefore, 2 × 3 = y × 1 

y = 6 

Hence, 6 persons are required to fit all the windows in one day.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...