Math, asked by Manishpaul, 1 year ago

A train takes 2 hours less for a journey of 300 km if its speed is increased by 5km/h from its usual speed.Find the usual speed of the train.

Attachments:

Answers

Answered by maheshwaranlupp0yaxy

Hope it helped.....

Mark my answer as brainliest.

Feel free to message me if you have any doubts.

-Maheshwaran.

Attachments:

Manishpaul: are u sure this is right answer??

maheshwaranlupp0yaxy: Quite sure

Manishpaul: I have no. answer of this question

Manishpaul: ye set ka question tha

Manishpaul: mera board ka exam h

Manishpaul: aap sure h??

maheshwaranlupp0yaxy: Yeah dude

Manishpaul: o.k than

Manishpaul: Thanks for helping me

Answered by rohitkumargupta

HELLO DEAR,

Let X be the usual speed
then the increase in speed be(x+5)

$- \frac{300}{x + 5} + \frac{300}{x} = 2 \\ = > \frac{ - 300x + 300x + 1500}{ {x}^{2} + 5x} = 2 \\ = > \frac{ 1500}{ {x}^{2} + 500x } = 2 \\ = > 1500 = 2 {x}^{2} + 10x \\ = > 2 {x}^{2} + 10x - 1500 = 0 \\ = > {x}^{2} + 5x + 750 \\ = > {x}^{2} + 30x - 25x - 750 = 0 \\ = > x(x + 30) - 25(x + 30) \\ = > (x - 25)(x + 30) \\ = > x = 25 \: or \: x = - 30$
I HOPE ITS HELP YOU DEAR,
THANKS

rohitkumargupta: tab time 2less time lag rha hai

rohitkumargupta: yani 300/x=2+300/(x+5)

Manishpaul: accha to isme positive wale ko pehle likhenge or negative wale ko bad me???

rohitkumargupta: hn

rohitkumargupta: usse koi matlab nhin hai

rohitkumargupta: kaese bhi likhi

Manishpaul: accha yhi confusion tha

Manishpaul: Thank u

rohitkumargupta: Ab nhin hai n

Manishpaul: nhi ab clear h

Previous Question

Next Question