The speed -time graph of a particle moving along a fixed direction id shown ifn Fig. 2 (b) . 31. Fid (i) distance travelled by the particle between ` 0 sec` to ` 10 sec` (ii) average speed between thid interval (iii) the time when the speed was minimum (iv) the time when the speed was maximum.
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Explanation

(i) Distance trvallled by particle in time interval `0 ` to ` 10` seconds is
S=area under velocity-time graph ltBrgt ` 1/2 xx ( 10 - 0) xx ( 12 -0) = 60 m`
(ii) Average speed ,
` v_(av) = ( Total distance travelled) / ( total time taken) = ( 60)/( 10) = 6 ms^(-1)` ltbRgt (ii) Speed of particle is minimum at ` t= 0 s` and ` t= 10 s`
(iv) Speed of particle is maximum at ` t= 5s `.