Last Updated On [03-11-2023]
The average age of group of persons going for picnic is 16 years. Twenty new persons with average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. The number of persons initially going for picnic is
(a) 5 (b) 10 (c) 20 (d) 30
Question ID - 50906 :- The average age of group of persons going for picnic is 16 years. Twenty new persons with average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. The number of persons initially going for picnic is
(a) 5 (b) 10 (c) 20 (d) 30
The average age of group of persons going for picnic is 16 years. Twenty new persons with average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. The number of persons initially going for picnic is
(a) 5 (b) 10 (c) 20 (d) 30
Then,
Next Question :
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Four particles A, B, C and D with masses mA = m, m B =2m, m C =3m and mD = 4m are at the corners of a square. They have accelerations as shown. The acceleration of the centre of mass of the particles is
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