Question

During manoeuvres on a space walk, an astronauts pulse rate first rose 48 beats per minute, then fell 15 beats per minute, rose 32 beats per minute and after the astronauts return to the capsule fell 50 beats per minute. What is the net change in his pulse rate?

Answer 1

The net change in his pulse rate is 15 beats per minute

Solution:

An astronauts pulse rate first rose 48 beats per minute : + 48

Then fell 15 beats per minute : - 15 ( negative sign means "fell" 15 beats per minute  )

Then rose 32 beats per minute : + 32

Astronauts return to the capsule fell 50 beats per minute : -50

Therefore,

Net change = +48 - 15 + 32 - 50 =  15

Thus net change in his pulse rate is 15 beats per minute

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During manoeuvers on a space walk,an astronauts pulse rate first rose 48 beatsper minut,then fell 15 beats per minute,rose 32beats per minute and after the astronauts return to the capsule fell 50 beats per minute.what is the net change in his pulse rate?

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Answer 2

Given : ‘an astronaut ‘s pulse rate rose 48 beats per minute, then fell 15 beats per minute, again rose by 32 beats per minute, and after the astronaut’s return to the capsule, fell 50 beats per minute.

To find : net change in his pulse rate

Solution:

rose 48 beats per minute

fell 15 beats per minute,

rose by 32 beats per minute

fell 50 beats per minute.

Total Rise = 48  + 32 = 80 beats per minute

Total fall = 15 + 50  = 65 beats per minute

Net Rise  =  80 - 65  = 15 beats per minute

net change in his pulse rate = 15 beats per minute

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