1. A car completed a journey of 400 km in $$12\frac{1}{2}$$ hrs. The first $$\frac{3}{4}$$th of the journey was done at 30 km/hr. Calculate speed for the rest of the journey.





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  • By: anil on 05 May 2019 03.04 pm
    Distance covered at 30 km/hr = $$frac{3}{4} imes400=300$$ km Let remaining distance, i.e. 100 km be covered at speed = $$x$$ km/hr According to ques, => $$frac{300}{30}+frac{100}{x}=frac{25}{2}$$ => $$frac{100}{x}=12.5-10$$ => $$x=frac{100}{2.5}=40$$ $$ herefore$$ Speed for the rest of the journey = 40 km/hr => Ans - (C)
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