a car travels first 30km with uniform speed of 60kmph and the next 30km with a uniform speed of 40kmph.then its total time of journey
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CASE I ___
distance covered ,d=30km
speed,s=60 kmph
t=d×s
time=30×60= 1800h
CASE II___
distance covered,d=30km
speed,s=40kmph
t=d×s
time=30×40=1200h
NOW___
Total time taken=1800+1200
t =3000h
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