Question

Madhuri's heart beats 360 times in 5 minutes. About how many times does it
beat in half an hour?​

Answer 1

Answer:

The heart beats 72 times in a minute. How many times does it beat in three hours?

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The heart beats 72 times in a minutes, how many times does it beat in 3 hours ?

72 Times = 1 Minute

3 Hours = ?

Let's convert 3 hours to minutes we all know it's 180 Minutes or not :/

note : "?" represents the "times'

recap

72 Times = 1 Minute

180 Minutes = ?

Then cross multiply :

72 times ( ?) * 180 minutes ( 1 Minute)

? = 72 180 minutes

--- * ---

72 72

? = 180 minutes * 72 times

12,960 times in 3 hours.

Hope that was helpful :)

Answer 2

Answer:

in 5 mins, 360 beats.

in 30 mins,?

so in 1 min 360/5beats

hence 72 beats per minute

hence in 30 minutes

No of beats = 72×30

ANSWER = 2160