The K.E. of a person is just half of K.E. of a boy whose mass is just half of that person. If person increases its speed by 1 m/s, then its K.E. equals to that of boy then initial speed of person was -

If a man increase his speed by 2m/s, his K.E. is doubled, the original speed of the man is

If a man increase his speed by 2m/s, his K.E. is doubled, the original speed of the man is

The kinetic energy of a man is half that of a boy whose mass is half that of the man. When the man speeds up by 5m^(-1) , his kinetic energy is 100% more than that of the boy. The initial velocity of the man is

A man who is running has half the kinetic energy of a boy of half his mass the man speeds up by 1 ms^(-1) and then has the same kinetic energy as the boy the initial speed of the boy is

When the momentum of a body increases by 10%, its K.E. increases by

In a class there are 60 boys and 30 girls. In it, half of the boys and half of the girls have squint eyes. If a person is chosen at random , the probability for the person to be either a boy or a squint eyed person from girl