Looking at the graph closely we can see that the heart rate increases from 0 to 6 min then became steady from 6 to 25 min then finally decreases from 25 to 30 min. Therefore the correct answer is:
“The heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually decreases for 5 minutes.”
In real life cardiac exercises, we can interpret that the period from 0 to 6 min is the period where the person is still warming up thus leading to an increase in heart rate. At 6 min, the person is fully warmed up hence reaching a stable heart rate. Then at 25 min, the person starts cooling down which means that the exercise is ending soon.
Both cylinder are similar Volume of a cylinder is πr^2h if we consider both has same radius as they are similar Lets say V1 is volume of small cylinder and V2 is volume of big cylinder. V1/V2=πr^2x5/πr^2xh 125/343=5/h 0.36=5/h h=5/0.36 h=13.72 ft
