Question

Solve the questions in given above image to attacheing​

Answer 1

Answer:

Thus speed of train was 30 km/hr

Step-by-step explanation:

Let the speed of train= x km/hr

Time taken=360/x hrs

If the speed were 10 km/hr more then

time=360/(x+10)

As per question

360/x-360/(x+10)=3

360(x+10)-360x=3x(x+10)

120(x+10)-120x=x(x+10)

120x+1200-120x=x²+10x

x²+10x-1200=0

x²+40x-30x-1200=0

x(x+40)-30(x+40)=0

(x+40)(x-30)=0

x=30 or -40

Thus speed of train was 30 km/hr