Is dropped from a tower with with zero velocity reaches ground in 4 second the height of the tower is about?

The Railway Recruitment Board will release the RRB Group D Answer Key on 14th October 2022. The candidates will be able to raise objections from 15th to 19th October 2022. The exam was conducted from 17th August to 11th October 2022. The RRB (Railway Recruitment Board) is conducting the RRB Group D exam to recruit various posts of Track Maintainer, Helper/Assistant in various technical departments like Electrical, Mechanical, S&T, etc. The selection process for these posts includes 4 phases- Computer Based Test Physical Efficiency Test, Document Verification, and Medical Test. 

practice

A body is dropped from a tower with zero velocity reaches ground in $$4s$$. The height of the tower is about:-

• A

  $$80m$$

• B

  $$20m$$

• C

  $$160m$$

• D

  $$40m$$

A body dropped from a tower with zero velocity, reaches the ground in 4s. The height of the tower is about m.

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