On My scooter, the rear wheel's diameter is 6 cm more than the front wheel's. The rear wheel's circumference is ___ cm more than the front wheel's.
A) 3π B) 6π C) 9π D) 36 π
3 answers
π(d+6) = πd + 6π
front wheel's circumference = d π
rear wheel's circumference = ( d + 6 ) π
( d + 6 ) π - d π =
π ∙ d + π ∙ 6 - d π =
d ∙ π + 6 ∙ π - d π =
d π - d π + 6 ∙ π = 6 π
rear wheel's circumference = ( d + 6 ) π
( d + 6 ) π - d π =
π ∙ d + π ∙ 6 - d π =
d ∙ π + 6 ∙ π - d π =
d π - d π + 6 ∙ π = 6 π
thx
1 answer