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Nidhi and Ria are very close friends. Nidhi’s parents own a Maruti Alto. Ria’s parents own a Toyota Liva. Both the families decide to go for a picnic to Somnath temple in Gujrat by their own cars. Nidhi’s car travels x km/h while Ria’s car travels 5 km/h more than Nidhi’s car. Nidhi’s car took 4 hrs more than Ria’s car in covering 400 km. What is the the speed of Nidhi’s car? |
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Answer» 20 km/hour `x^(2) +25x -20x -500=0` `x(x+25)-20(x+25)=0` `(x+25) (x-20)=0` `x=20, -25` Since x =− 25 is not POSSIBLE, we get x = 20 THUS (a) is correct OPTION. |
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