[" Which tum of the semes? "],[" a) "3,-3sqrt(3),9" ...F29"]

Arjit's age is 3 years more than 1.5 times the age of Heera, whose age in tum is 10 years more than the age of Deepika. If 5 times the age of Deepika is equal to 3 times the age of Arjit, what is the sum of the present ages of the trio?

The aqueous solution of a certain compound (X), when added to a copper sulphate solution, a brown precipitate is obtained which tums white on addition of excess of Na_(2)S_(2)O_(3) solution. Its aqueous solution, when added to Ag^(+) ion solution, a yellow curdy precipitate is obtained which is insoluble in ammonium hydroxide. Hence, compound (X) is

A scooter going towards east at 10 m s^-1 turns right through an angle of 90^@ . If the speed of the scooter remains unchanged in taking tum, the change in the velocity of the scooter is