How long is a rectangular field with a width of 3/5 mile and an area of 21/50 square mile?
2 answers:
A = B*L
A = 21/50 sq miles
B = 3/5 mile
L = ? mile
L = A/B
L = (21/50)/(3/5)
* dividing by fraction is same as multiplying by it's reciprocal
L = (21/50)*(5/3)
L = (21*5)/(50*3)
L = 105/150
*divide both numerator & denominator by 5
L = 21/30
*divide both numerator & denominator by 3
<u><em>L = 7/10 miles</em></u>
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