Question

a truck covers a distance of 150 km

Answer 1

Answer:

Time =5hrs.

let us take =x as average speed to cover 150km then x+20 will be the average speed to cover next 200km then

150/x +200/x +20=5

5x square +100x=350x+3000x square -50x-600=0 by solving the equation we get the x=60km therefore average speed to cover 150km =60km/h

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Time =5 hours

let us take x as average speed to cover 150 km

then x+20 will be the average speed to cover next 200 km

then

150/x+200/x+20=5

5 x square+100 x=350 x+3000

x square-50 x-600=0

by solving the equation

we get the x=60 km

therefore average speed to cover 150 km

=60 km/h