Question

solve the problem..fast...no.12

Answer 1

Answer:

27 seconds

Step-by-step explanation:

The insect climbs 2 cm in 1 sec and then slips down 1cm in 1sec. In this whole process, he takes 2 sec to climb 1cm.

Let the time taken to climb 13 cm be x sec.

$= > \frac{2}{1} = \frac{x}{1</em><em>3</em><em>} \\ \\ = > x = </em><em>2</em><em>6</em><em>$

Till now, he has climbed up 13 cm. So, in next second, he'll be on top.

Thus, the insect will take 27 sec to climb 15 cm.

Hope it'll help you.....