Math, asked by devang682, 11 months ago

john wants to estimate value of pie he measures the circumference of a circular pizza as 105 cm and it's diameter as 34 cm , both correct to nearest cm calculate the lower bound of his estimate of the value of pie give you answe correct to 3 d.p

Answers

Answered by rajaluxmy1967

c = πd

c = 105 cm

d = 34 cm

π = ?

Therefore,

c = πd

π = $\frac{d}{c}$

π = $\frac{34}{105}$

π = 0.3238

π = 0.324

devang682: ok

devang682: fast

devang682: please

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rajaluxmy1967: c = πd
Here c means the circumference there is a equation for circumference that is c = 2πr
c = 105 cm

d = 34 cm

π = ?

Therefore,

c = πd

π = c/d

π = c/d

π = 3.0882

π = 3.088

devang682: ok

devang682: thanx

rajaluxmy1967: Here r means the radius that means 2r=diamter

rajaluxmy1967: 2 x r = diameter do u understand now

devang682: yes

Answered by kayamakitty

Formula for circumference (C) = πd
Formula for π = C/d
Limit of accuracy: 1/2 = 0.5
Division (lower bound answer) = lower bound/upper bound
(Lower bound) (C) : 105 - 0.5 = 104.5 cm
(Upper bound) (d) : 34+0.5 = 34.5 cm
104.5/34.5 = π
3.02898550725 = π
3.209 = π (lower bound)

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