Question

a tortoise covers one kilometer in 4 hours it taken rest for 20mint after every kilometer how much time does it takes for the tortoise to cover 3.5kilometrs?

Answer 1

A tortoise taken 15hour10min to cover a distance of 3.5k

Answer 2

Answer:

14 hours 50 minutes

Step-by-step explanation:

Since, the tortoise covers one kilometer in 4 hours it taken rest for 20 min after every kilometer,

Thus, the time taken by him in 1 km = 4 hours 20 minutes

$=4\frac{20}{60}$

$=4\frac{1}{3}$

$=\frac{13}{3}\text{ hours}$

According to the question,

It has to cover 3.5 km,

Since, in the last km he would not take rest,

Also, the time taken by him in 2.5 km = $2.5\times \frac{13}{3}=\frac{325}{30}\text{ hours}$

Hence, the time taken by it to cover 3.5 km = Time taken by him in 2.5 km + Time taken by it in last km.

$=\frac{325}{30}+4$

$=\frac{325+120}{30}$

$=\frac{445}{30}$

= 14 hours 50 minutes.