चाल
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(aangrezi:Speed) kisi gatiman vastu ke sthiti parivartan ki dar arthath ek sekend mean chali gee doori ko us vastu ki chal kahate haian.
chal= chali gee doori/samay
vastu ki chal ek adish rashi hai v sadaiv dhanatmak hoti hai. isaki SI matrak mitar/sekend hai.
ausat chal
kisi vastu dvara ikaee samay mean tay ki gee doori ko ausat chal kahate haian.
ausat chal=kul tay ki gee doori/doori ko tay karane mean laga samay
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