paper4 math

[aashish]

guys pls help me


oct 2010 paper42 q.no.7

 

[nisurju]

differentiate v.it gives u acceleration.then equate it with 0.i.e,a =0.
solve the equation and u will get two values which are t1 and t2.
then integrate v again.u will get the expression for distance.use t=30 and then u will get the answer!

 

[aashish]

pls tell me the idea to equate with a=0 in this case