alleryꯑꯣꯏꯒꯅꯤ꯫ ꯕꯣꯠ ꯑꯃꯒꯤ ꯁ꯭ꯇꯤꯜ-ꯋꯥꯇꯔ ꯁ꯭ꯄꯤꯗ ꯑꯁꯤ 12 km/h ꯑꯣꯏ꯫ ꯃꯁꯤꯅꯥ 30 km ꯗꯥꯎꯅꯁ꯭ꯠꯔꯤꯃꯗꯥ ꯑꯃꯁꯨꯡ 18 km ꯑꯄꯁ꯭ꯠꯔꯤꯃꯗꯥ 4 hꯗꯥ ꯀꯣꯅꯁꯤꯜꯂꯤ꯫ ꯄꯣꯖꯤꯇꯤꯚ ꯑꯣꯏꯕꯥ ꯁ꯭ꯠꯔꯤꯝ ꯁ꯭ꯄꯤꯗ ꯑꯗꯨ ꯈꯪꯗꯣꯀꯎ꯫
A3 km/h
B2 km/h
C1 km/h
D4 km/h
Answer & Solution
Correct answer: A. 3 km/h
ꯑꯣꯏꯒꯅꯤ꯫
ꯁ꯭ꯠꯔꯤꯝ ꯁ꯭ꯄꯤꯗ xꯒꯤꯗꯃꯛꯇꯥ, 30/(12+x) + 18/(12−x) = 4 ꯑꯁꯤ ꯍꯟꯊꯍꯜꯂꯤ꯫
x(x−3)=0;
ꯄꯣꯖꯤꯇꯤꯕ ꯑꯣꯏꯕꯥ ꯁꯣꯂꯨꯁꯟ ꯑꯁꯤ 3 km/h ꯑꯣꯏ꯫
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