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A farmer used#1/2# of her land for planting maize,#1/5#for planting beans,#1/3#of the remainder for grazing and the rest for horticulture. If the farmer used 10 ha for grazing, how much land
does she have?
A. 100ha
B. 33#1/3#ha
C. 30ha
D. 11#1/30#ha