Ek kaar 3 km ke char kramik doori 10km/ghanta,20km/ghanta,30km/ghanta wa 60km/ghanta ki gati se tay karti hai uski osat gati hai?
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Step-by-step explanation:
kul doori = 3 + 3+ 3+3 = 12 km
3km 10 km/h ki speed se to time= 3/10 h
-------20km/h--------------------------- = 3/20 h
--------30km/h-------------------------- = 1/10 h
--------60km/h-------------------------- = 1/20 h
kul samay =3/10 + 3/20 + 1/10 + 1/20 = 12/20 h
ausat gati = kul doori /kul samay
=12/12/20 = 20 km/h ANSWER
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