Question 1084274
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An object starting from rest travels 20m in first 2sev and 160m in next 4sec what will be the velocity after 7sec
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The presented formulation has <U>a number</U> / <U>a lot</U> of deficiencies. 


<pre>
1.  The formulation does not say that the motion is uniformly accelerated.

    (Otherwise the problem doesn't make sense).  So, this assumption <U>MUST</U> be added.  

     And if it is so, then the initial velocity is zero and the acceleration is a = 10 m/s^2.



2.  What are these "next 4 seconds" ?? - Are they 3-rd, 4-th, 5-th an 6-th seconds (if to understand it literally as it is written) ??

    
    Then it is consistent with a = 10 m/s^2, but then this part is <U>unnecessary, excessive and carries ZERO additional information</U>.
</pre>


After saying all of that, I have no any desire to work on it further.


The problem <U>MUST BE RE-EDITED</U> to be considered.



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The solution is based on the formula S = {{{(at^2)/2}}}.
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