Question

In 10 minutes a heart can beat 700 times. At this rate in how many minutes will a heart beat 140 times? At what rate can a heart beat?

Answer 1

700 ÷ 10 = 70

This means that a heart beats 70 times per minute


70 : 1
140 : ?

70 x 2 = 140

1 x 2 = 2

This means that a heart beat 140 times every 2 minutes

Answer 2

Heart can beat 140 times in = 2 minutes .

Rate of heart beat= 70 beat per minute .

Explanation:

Given : In 10 minutes a heart can beat 700 times.

To find : At this rate in how many minutes will a heart beat 140 times.

Solution : We have given

Heart can beat 700 times in = 10 minutes .

Heart can beat 140 times in =
`(10* 140)/(700)` minutes .

Heart can beat 140 times in =
`(1400)/(700)` minutes .

Heart can beat 140 times in = 2 minutes .

Rate of heart beat :
`(140)/(2)` beat per minute.

Rate of heart beat= 70 beat per minute .

Therefore, Heart can beat 140 times in = 2 minutes .

Rate of heart beat= 70 beat per minute .