Question

If a train runs 150 km. in 2 hours then the train will run _____km​

Answer 1

Answer:

⇒ Distance given =150km

⇒ Let the forward speed be x and the return speed will be x+10

We know that, Time=

Distance

speed

∴

$\frac{150}{x} = \frac{150}{x + 100} + 2.5$

⇒ 150(x+10)−150x=2.5×x(x+10)

⇒ 150x+1500−150x=2.5x 2+25x

⇒ 2.5x 2+25x−1500=0

⇒ 25x 2 +250x−15000=0

⇒ x 2 +10x−600=0

⇒ x 2+30x−20x−600=0

⇒ x(x+30)−20(x+30)=0

⇒ (x+30)(x−20)=0

The value of cannot be negative.

∴ Forward speed will be 20km/hr

⇒ Return speed =20+10=30km/hr

⇒ The required product =20×30=600km/hr

Answer 2

Answer:

yah answer nahin hoga okay

seee

kk89