9. Tarzan swings on a vine in the jungle. He takes 2.3 seconds to swing across a river once.
How long is the vine?

Assumption

Take his speed as 11 m/s

25.3 m

Explanation:

Taking the speed of Tarzan as 11 m/s, we deduce that speed, s=d/t where d is the diatance covered in meters, t is time taken in seconds and s is the speed of Tarzan.

Making d the subject of the formula then d=st

Substituting 11 m/s for s and 2.3 s for t then we can get rhe length of vine as

D=2.3*11=25.3 m

Therefore, the distance representing the length of vine is approximately 25.3 m. If the speed is not same as the one taken as assumption here, you get the length by just multiplying the actual speed and time which is given as 2.3 seconds. Generally, the diatance will be 2.3v where v here is new speed/actual speed.