The relationship between the force F and position x of a body is as shown in figure. The work done in displacing the body from x = 1 m to x = 5 m will be

Work done = area under F-x graph = area of rectangle ABCD + area of rectangle LCEF + area of rectangle GFIH + area of triangle IJK  =(2−1)×(10−0)+(3−2)(5−0)+(4−3)(−5−0)+12(5−4)(10−0)=15  J