0

# Calculation Body Mass

Calculating body-mass index (BMI) is a way to gauge whether a person should lose weight. Doctors recommend that body-mass index values fall between 19 and 25. The formula for Body mass index B is B=705w/h^2, where w is weight in pounds and h is height in inches. A patient is 6ft 2 in tall. What should his or her weight be to have a body mass index of 25? (Round to the nearest whole pound)

### 5 Answers by Expert Tutors

Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
0
Ok:

h = 6ft, 2 in = 6* 12" + 2 = 74"

W is unknown and has to be evaluated.

750 w / 742 = 25

w = (742 * 25 )/ 705 = 194.

Thank you Jim . I took 750 for 705.
George T. | George T.--"It's All About Math!"George T.--"It's All About Math!"
0
Theresa:

Per your formula, B=(705w)/h2, where w=weight in pounds and h=height in inches.

From the info provided, we know that B=25 and h=74 inches (6ft * 12 inches per foot + 2 inches).

Substituting these values in the formula, we get:  25=(705w)/(74*74)
25=705w/5476

Now, solving for w, we get w=(25*5476)/705=194.18 pounds (rounded to nearest hundredth).

Hope this helps.

George T.
Jim S. | Physics (and math) are fun, reallyPhysics (and math) are fun, really
4.7 4.7 (175 lesson ratings) (175)
0
Solving for w gives:

w=Bxh/705

Since you were given that:
B=25
h=74"
then w=25x(742)/705= 194 lbs

Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.6 4.6 (13 lesson ratings) (13)
0

B=705w/h^2
Solve for w,
w = Bh^2/705 = 25(6*12+2)^2/705 = 194.2 lb <==Answer