alleryꯑꯣꯏꯒꯅꯤ꯫ A 120 m 54 km/h ꯇ꯭ꯔꯦꯅꯅꯥ 60 sꯗꯥ ꯆꯞ ꯃꯥꯟꯅꯕꯥ ꯃꯑꯣꯡꯗꯥ ꯆꯠꯂꯤꯕꯥ 180 m ꯇ꯭ꯔꯦꯟ ꯑꯃꯕꯨ ꯑꯣꯚꯔꯇꯦꯛ ꯇꯧꯏ꯫ ꯇ꯭ꯔꯦꯅꯒꯤ ꯈꯣꯡꯖꯦꯜ ꯇꯞꯅꯥ ꯇꯞꯅꯥ ꯆꯠꯄꯥ?
A36 km/h
B30 km/h
C40 km/h
D45 km/h
Answer & Solution
Correct answer: A. 36 km/h
ꯑꯣꯏꯒꯅꯤ꯫
ꯔꯤꯂꯦꯇꯤꯚ ꯁ꯭ꯄꯤꯗ ꯑꯁꯤ (120 + 180)/60 = 5 m/s;
ꯇꯞꯅꯥ ꯇꯞꯅꯥ ꯇ꯭ꯔꯦꯟ ꯑꯁꯤ 15 − 5 = 10 m/s = 36 km/hꯗꯥ ꯆꯦꯜꯂꯤ꯫
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