1.

A person can cover half of the distancein 15 seconds with 20m/ second if he covers remaining half distance with 15 meter per second in what time he covers​

Answer»

TIME = 40 SECExplanation:LET the distance be x metres.Then, DISTANCE = SPEED * TIME1/2 of x = 20*15x/2 = 300x = 300 * 2x = 600 Now if half the distance is 600 metres Then,TOTAL DISTANCE = 1200 METRES NOW,ACCORDING to the question,if half the distance is now travelled at a speed of 15 m/secthen , T =t = d/st = 600/15t = 40This is the time for second case.if U want to know the total time u can add Time of first case with the time of second caseto know the total time taken...now , total time = 40 + 15                             = 55 sec



Discussion

No Comment Found