Question

12. A body of mass 4 kg is acted upon by a force the position of body with respect to times denoted by x=t^4/4. The work done by the fores in first three seconds can be expressed in SI
system as
(a) 1458J
(b) 729 J
(c) 54J
(d) 27J​

Answer 1

my method is correct

please check the options again