A car covers 30km at a uniform speed of 60km/h and the next 30km at a uniform speed of 40km/h.find the total time taken?
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t1 =distance /speed
30/60=1/2sec.
t2=distance /speed
30/40=3/4sec.
total time=1/2+3/4=4+6/8=10/8=5/4
ANS=5/4
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