Subject :NSO Class : Class 3
Four boys rolled oil drums of the same weight and size up the ramps of different heights as shown here. Which one of them put the most effort?
A 
B 
C 
D 
b
Ans 1:
Class : Class 2
A
Ans 2:
Class : Class 3
the answer is a
Ans 3:
Class : Class 7
A
Ans 4:
Class : Class 4
Ans 5:
Class : Class 3
how? A is the correct answer? how?