1.

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?

Answer»

20 km/hour
15 km/hour
25 km/hour
10 km/hour

Solution :We have `x^(2) +5X -500=0`
`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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