bubSaramgirlissjan bubSaramgirlissjan

29-04-2016
Mathematics

Answered

Find the diameter of a circle with an area of 804.2 square centimeters. (Use 3.14 for )

Select one:

A32 cm
B8 cm
C48 cm
D64 cm

Verified Answer :

apologiabiology apologiabiology

29-04-2016

A=pir^2
pi=3.14
2r=d
804.2=pir^2
804.2=3.14r^2
divide by 3.14
256.1146...=r^2
sqrt both sides
16=r
2r=d
2*16=d=32

answer is A

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