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Dear jauneet
Total time of flight
t =2usin45/g =2*70/10√2
=7√2
in this time it has to cover 490/3 distance with velocity 70cos45 and 490/3 distance with velocity e70cos45/
7√2 = 490/3*70cos45 + 490/3*e70cos45
7 = 7/3 + 7/3e
1= 1/3 + 1/3e
e=1/2
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