Question

An insect crawls up 5cm every second on a vertical rod and then falls down 2cm over the seconds how many seconds will it take to climb the rod (how to solve)

Answer 1

In first sec insect crowl5cm
In other sec insect fall 2cm
So insect crowl 3cm in 2sec

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