Hi... Actually I have a doubt in ganit prakash class 7 chapter 06.. figure it out143-144 question 9 the answer is given even but the answer should be even.. please correct the answer
10 years ago the age of a father was four times the age of his son then. 10 years hence, the age of the father will be twice the age of his son. find the present age
A hockey ball of mass 200g traveling at 10m/s is struck by a hockey stick so as to return it along it's original path with a velocity of 5 m/ s. Calculate the magnitude change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.
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