Question

A body covers 12m in 2sec and 20m in 4sec. what distance it would cover in 9sec.​

Answer 1

in first case,

speed=12/2=6m/s

in second case,

speed=20/4=5m/s

frm above two cases, we can conclude that the speed of body decreases by 1 after every double time interval (after 2min. speed=6m/s nd after next 4min. speed=5m/s ) ---------eq(1)

so, speed of body after 9sec. = 3m/s

[frm eq1 we can know the speed of bode after 8th second]

so now we have both speed nd time...

so,

distance=speed×time

=(3)×(9)

=27m

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Answer 2

Answer:

HEY MATE HERE IS UR ANSWER

Explanation:

in first case,

speed=12/2=6m/s

in second case,

speed=20/4=5m/s

frm above two cases, we can conclude that the speed of body decreases by 1 after every double time interval (after 2min. speed=6m/s nd after next 4min. speed=5m/s ) ---------eq(1)

so, speed of body after 9sec. = 3m/s

[frm eq1 we can know the speed of bode after 8th second]

so now we have both speed nd time...

so,

distance=speed×time

=(3)×(9)

=27m