Question

an insect climbs 2 cm up a slippery rod in 1 second and slips down by 1 cm over the next second how many second will the insect take to reach the top of the rod 15 cm high?​

Answer 1

Answer:

27seconds

Step-by-step explanation:

In One second it climbs 2cm

next second it slips 1cm

net gain in height is that,

in 2seconds it can climb 1cm

(13×2)seconds it climbs 1×13..i.e,

in 26s it climbs 13cm..next second,

27s,it climbs 2cm,hence it reaches top of rod at end of 27s

Answer 2

Answer:

Step-by-step explanation:

Insect climb 2cm up in 1sec

Next it will down1cm in1sec

Which means he take 2sec to reach 1 cm

15*2=30

Ans:30 sec