Question

The unit of energy is 10 J, if the unit of mass is
tripled, unit of acceleration is doubled and the unit of
length is halved. What will be the new unit of energy?
(A) 15 J
(B) 30 J
(C) 300 J
(D) 3 J​

Answer 1

Answer:30J

Explanation:

E=mal

Now take ratios of E1 and E2 as I have done in the image.