For the velocity time graph shown in Fig. 2 (CF).14, the distance covered by the body in last two seconds of its what fraction if the total distance covered by it in all the seven seconds?
.

Options

A. `1//2`
B. `1//4`
C. `1//3`
D. `2//3`

Answer

B

Explanation

Total distance ` = 1/2 xx 10 xx 2 + 2 xx 10 + 1/2 xx 2 xx 10 = 40m`
Distance travelled in last 2sec` = 1/2 xx 2 xx 10 = 10 m`
`(S_("last 2 sec") )/(S_7) = 10/40 = 1/4`