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There is a 6-storey building with 20 rooms on each floor. Some toxic material is concealed in the building. Three groups of officers start the search operation simultaneously. The first group searches the 1st and 2nd floors. The second group handles the 3rd and 4th floors. The third group takes over the 5th and 6th floors. If it takes 1 minute to reach any nearest floor and 1 minute to search each room, how much time will it take to complete the entire search operation?

There is a 6-storey building with 20 rooms on each floor. Some toxic material is concealed in the building. Three groups of officers start the search operation simultaneously. The first group searches the 1st and 2nd floors. The second group handles the 3rd and 4th floors. The third group takes over the 5th and 6th floors. If it takes 1 minute to reach any nearest floor and 1 minute to search each room, how much time will it take to complete the entire search operation? Correct Answer 46 min

Given:

There is a 6-storey building with 20 rooms on each floor. Some toxic material is concealed in the building.

Three groups of officers start the search operation simultaneously.

Concept used:

Time taken to complete the entire search operation is time taken by third group to reach 5th floor from ground floor and search 5th floor + time taken by third group to reach 6th floor from 5th floor and search 6th floor

Calculation:

Time taken to complete the entire search operation =  time taken by third group to reach 5th floor from ground floor and search 5th floor + time taken by third group to reach 6th floor from 5th floor and search 6th floor

= 5 min + 20 min + 1 min + 20 min

= 46 min 

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