A wooden block of mass 60g has dimensions shown . The density of the box is A)0.5cm-³
B)5gcm-³
C)5kgcm³
D)0.5kgcm³​

I think c is answer if I was wrong so repore

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.