Question

An insect crawls up 5cm every second on 60cm vertical rod and then falls down 2cm over the mext second. how many seconds will it take to climb the rod?

Answer 1

May be it's 39 or 40 seconds

kindly see the attachment

Answer 2

Answer:

40 sec

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