Instructions

In each of these question, you are given two statements. To answer these questions, you can use oneor both the statements. Give your answer as

Question 36

How many hours will it take for all the students and teachers together to put up a tent?
A. There are 4 teachers and 7 students.
B. All the teachers working together can put up the tent in 5 hours while all the students working together can do so in 3 hours.

Solution

Statement A alone is insufficient, as there is no time given and statement B alone is sufficient, as the number of teachers and students are missing.

All the teachers can complete 1/5 of work in 1 hour and all students can complete 1/3 of work in 1 hour. Therefore in 1 hr they can complete 8/15 of work in 1 hour and total work will be completed in 15/8 hours.

$$\therefore$$ Statement B alone is sufficient.

=> Ans - (B)


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