what is its answer??
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Ans is C i.e 27 sec. Look at the detailed solution in the pic. I hope this will help you.
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sks2971996:
Therefore, distance covered by both of them will be same.
it means after 4 sec when the a car cross that point car b starts
Please look at the fig. I explained using the figure.
The question says- after car A travels for 4 sec, car B starts
we have to find time at which the 2 cars meet
imagine 2 runners A and B. Now A starts earlier than B. B starts later than A but runs faster than A. A point will come where B overcomes A.
how did u find Xa
Xa=speed*total time
Xa=20(t+4)
Xb=ut+(1/2)*a*t^2. Here u=0 since car B starts from rest.
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