Question

an insect crawls up every second 5 cm on 60cm and then fall Down 2 cm over the next seconds how many seconds will it take to climb the rod with solution​

Answer 1

Answer:

39 seconds

Step-by-step explanation:

The ant climbs up 5 cm in one second and slips down 2 cm

So,

The ant climbs 3 cm (5-2) for every 2 seconds

from here we can work with logic:

  in 36 seconds the ant would have climbed up 54 cm

  in 38 seconds it would have climbed up 57 cm

  in 39 seconds, it world have climbed (57+5) 62 cm

hence it would take minimum 39 seconds.

Hope that helps!

Answer 2

Answer:

40 s

Step-by-step explanation:

In first second climbs- 5 m

in next second falls down 2 m

therefore, in 2 sec, length climbed is 5-2=3 m

therefore,

to climb 3 m, time needed- 2 s

to climb 1 m time needed-2/3 s

to climb 60 m, time needed= 2/3*60=40

Ans. the insect will take 40 s to climb the 60 m rod