alleryꯁꯤꯇꯥꯅꯥ 30 ꯅꯨꯃꯤꯠꯁꯤꯡꯗꯥ ꯊꯕꯛ ꯑꯃꯥ ꯇꯧꯏ꯫ ꯁꯤꯇꯥ ꯑꯃꯁꯨꯡ ꯇꯥꯔꯥ ꯄꯨꯟꯅꯥ 20 ꯅꯨꯃꯤꯠꯁꯤꯡꯗꯥ ꯇꯧꯏ꯫ ꯇꯥꯔꯥ ꯈꯛꯇꯅꯥ ꯃꯊꯧ ꯇꯥꯏ꯫
A40 ꯅꯨꯃꯤꯠꯁꯤꯡ꯫
B45 ꯅꯨꯃꯤꯠꯁꯤꯡ꯫
C50 ꯅꯨꯃꯤꯠꯁꯤꯡ꯫
D60 ꯅꯨꯃꯤꯠꯁꯤꯡ꯫
Answer & Solution
Correct answer: D. 60 ꯅꯨꯃꯤꯠꯁꯤꯡ꯫
ꯇꯥꯔꯥꯒꯤ ꯔꯦꯠ ꯑꯁꯤ 1/20 - 1/30 = 1/60ꯅꯤ, ꯃꯔꯝ ꯑꯗꯨꯅꯥ ꯃꯍꯥꯛꯅꯥ 60 ꯅꯨꯃꯤꯠꯁꯤꯡ ꯃꯊꯧ ꯇꯥꯏ꯫
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