during a journey a car travels with speed of 20 kmph for first one hour ,with a speed of 25 kmph for next two hours .find the total distance travelled by the car in three hours.
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Answer:
70km
Explanation:
s = 20km/h
t=1h
d=20km
s=25km/h
t=2h
d=25×2=50km
total distance =20+50=70km
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