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8th Class Mathematics Linear Equations in One Variable Question Bank Linear Equations in one Variable

  • question_answer
    A boy travels a distance 25 km, in 4 hours partly on foot at rate 3.5 km/hr and partly on cycle at 9 km/hr. Find the distance on foot.

    A)  5 km                           

    B)  7 km 

    C)  6 km                           

    D)  8 km

    Correct Answer: B

    Solution :

    (b): Let 'x' hrs on foot, (4-x) hrs on cycle Distance on foot = \[3.5\times x\] Distance on cycle =\[9\times \left( 4-x \right)\] \[\Rightarrow 3.5x+9\left( 4-x \right)=25\] \[\Rightarrow 36-5.5x=25\] \[\Rightarrow x=2\] \[\therefore 3.5x=7\] km on foot.         


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