Question

In the given v-t graph the distance travelled by the body in $5$ seconds will be

• A. $100m$
• B. $80m$
• C. $40m$
• D. $20m$

Answer 1

The correct option is A $100m$

From the graph,

The magnitude of area under the v-t graph gives the distance travelled by the body.

For $0\le t\le 4s$

Displacement, $S_1=Area=\frac{1}{2}\times (40+20)\times 2+\frac{1}{2}\times (1+2)\times 20=90m$

For $4\le t\le 5s$

$S_2=\frac{1}{2}\times 1\times 20=10m$

Total distance, $d=S_1+S_2$

$d=90+10=100m$

The correct option is A.