Question

A work of 4800j is done on road of mass 40kg to lift it to a certain height .. calculate the height through which the load is lifted

Answer 1

Mgh= work

40×10×h=4800

h=12m

Answer 2

$work = mgh \\ 4800 = 40 \times 10 \times h \\ 4800 \div 400 = h \\ h = 12$
You can take the g=9.8 or 10