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A boy go to his school which is 12 km from his home . if boy increased his speed by 1 km/hr he reaches the school 1 hours before. find his speed of walking. |
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Answer» distance = 12kmlet original velocity and time be v,t=> distance = velocity * timechanged velocity = v+1changed time = t-1v*t = 12 = ( v+1)*(t-1)=>t-v-1 = 0 => t-v = 1t+v = 5 by solving we get velocity = 2 kmph |
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