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  • 1 answers

Pankaj Gupta 7 years, 8 months ago

4
  • 2 answers

Piyush Jha 7 years, 8 months ago

Let us considered original speed be xkm/h t=s/d A. T. Q. 63/x. =i When train increased its speed= 72/x+6. =i A. T. Q. =63/x +72/x+6=3 By L. C. M. =63x+378+72x/(x)(x+6) =135x+378/x²+6x By cross multiplication =135x+378=3x²+18x =135x-18x+378=3x² =117x+378=3x² =3x²-117-378 D =b²-4ac = 117²-(4).(3).(-378) =13689+4536 =18225 =x=-b+-√d/2a =x=-(-117)+-√18225 =117+-135=252/6. =42 or. -18/6=-3 = since speed cannot be negative we take speed=42 km/h

Aayush Patel 7 years, 8 months ago

42km/hr
  • 3 answers

Piyush Jha 7 years, 8 months ago

4u²-8u=0 =4u(u-2)=0 =4u=0 =u=0 u-2=0 u= 2 Let us consider 2 as alpha and 0as beta Alpha+beta=-b/a =2+0= 8/4 =2=2 Alpha ×beta = c/a =2×0=0/4 =0=0 Hence relationship has verified

Maunisha Mallan Mallan 7 years, 8 months ago

As it is given.. 4usquare+8u=0 Then.... Take 4 nd u as common,4u(u+2) Equating 4u nd u+2 equal to 0, 4u=0.....u=0 u+2=0....u=-2 Then.....sum of zeroes=-b/a ......0+(-2)=-8/4 -2. = -2 Then.... product of zeroes=c/a ..... ............0*(-2) =0/4 0. = 0

Tapan Pandey 7 years, 8 months ago

Yaar , 4u Ko common Lelo toh (u+2) bachega, fir 4u=0 then u=0, and u+2=0 then u=-2
  • 2 answers

Vishal Kaushik 7 years, 8 months ago

Account to delete pta nhi pr yeh ho skta h ki aap puri id change kr do fake dalke ok

Gyan Prakash 7 years, 8 months ago

Esse Account delete nhi hota hai.
  • 0 answers
  • 2 answers

Yogendra Singh 7 years, 8 months ago

Re exam date announced Monday or Tuesday

P S 7 years, 8 months ago

The date will be announced within 3 to 4 days
  • 1 answers

Abhijeet Rana 7 years, 8 months ago

The mean of 5 numbers is 18 . it means that there average is 18. So total sum of 5 numbers is 5× 18=90. And when one numbers excluded then total numbers are 4 . And mean = 16 so total sum = 16×4= 64. So to find that numbers we have to do 90 - 64=26.
  • 3 answers

Yogendra Singh 7 years, 8 months ago

√(x-0)²+(y-0)²=√x²+y²

Mr Lovely 7 years, 8 months ago

Under root x2+y2

Akif Ali Khan 7 years, 8 months ago

√xsquare + T-square unit
  • 2 answers

Tapan Pandey 7 years, 8 months ago

Your????????we all have to give maths exam......... OK.

Pankaj Gupta 7 years, 8 months ago

Kalidas
  • 6 answers

Shruti Sahoo 7 years, 8 months ago

I think around 9or 10

Maunisha Mallan Mallan 7 years, 8 months ago

Yea.. It's fake news..

Mitul Kumawat 7 years, 8 months ago

Rumors are there about 26 april

Pikachu X 7 years, 8 months ago

Maybe 26th April.... not sure if it's real or fake

Rekha Varshini 7 years, 8 months ago

Re-exam for maths will be held on 26th April

Darshanaa Yadav 7 years, 8 months ago

Not announce by cbse yet
  • 0 answers
  • 4 answers

Vishal Kaushik 7 years, 8 months ago

Let 4 consecutive terms be a-3d ,a-d,a+d,a+3d

Vishal Kaushik 7 years, 8 months ago

a =8 and d = +_2 and no. Are 2,6,10,14and 14,10,2 due to two values of d

Ankit Gupta 7 years, 8 months ago

Ab kya faayeda yr.. Ppr to cancel ho gya

Tanu Priya 7 years, 8 months ago

2,6,10,14
  • 0 answers
  • 5 answers

Satender Kumar 7 years, 8 months ago

thoda roo le taki cbse reexam cancel kar de maths ka

Anjali Shahni 7 years, 8 months ago

After knowing re examination of maths

Sanjana Yadav 7 years, 8 months ago

Phone hame study se disattract karta h
Sahi baat h

Sanjana Yadav 7 years, 8 months ago

Phone se dur
  • 5 answers

Maunisha Mallan Mallan 7 years, 8 months ago

First complete all chapter from ur ncert book.. Then try to revise RD sharma.. As well ncert exampler

Ashu Bhadouriya 7 years, 8 months ago

I am student of class 9 promote today for class10 that's why i ask

Mr Lovely 7 years, 8 months ago

Vidya question bank le lo..most of questions r asked from it

Satender Kumar 7 years, 8 months ago

RD SHARMA

Satender Kumar 7 years, 8 months ago

phale maths ka paper to dele fir baat karage extra book ki
  • 4 answers

Ashitha Kollur 7 years, 8 months ago

They will be announcing within this weak......

Deeksha Srivastava 7 years, 8 months ago

Who told u it's 26 april

Satender Kumar 7 years, 8 months ago

pakka

Ritu Dhingra 7 years, 8 months ago

Yes it is 26 april
  • 1 answers

Sanjana Yadav 7 years, 8 months ago

Ye to class 9 ka qtion h
  • 0 answers
  • 0 answers
  • 4 answers

Ritu Dhingra 7 years, 8 months ago

Search on google that " TIMES OF INDIA LATEST UPDATE OF CBSE" YOU WILL GET TO KNOW

Ritu Dhingra 7 years, 8 months ago

Date has been declared It is on 26 april

Mr Lovely 7 years, 8 months ago

Ples..wait..it will be clear within a week

Kapil Upadhyay 7 years, 8 months ago

Date will be released on Monday or Tuesday
  • 2 answers

Bhartendra Singh 7 years, 8 months ago

X =22.and Y =8

Anupam Garg 7 years, 8 months ago

X+y=30 X=30-y Put value of x in x-y=14 30-y-y=14 -2y=14-30 -2y=-16 y=8 (because minus cancel wth minus and we divide 2 by 16) Put value of y in x +y=30 X+8=30 X=30-8 X=22 So,the value of x and y is 22 and 8
  • 1 answers

Kapil Upadhyay 7 years, 8 months ago

X=22 y=8
  • 5 answers

Abhijeet Rana 7 years, 8 months ago

98 because it is between 1 and 100 so it does not include 1 and 100 i was also get confuse in exam.

Preksha Marwaha 7 years, 8 months ago

Is anyone 100% sure about the answer??

Abhishek Bansal 7 years, 8 months ago

100

Zehra Mustafa 7 years, 8 months ago

What was the answer

The Raj 7 years, 8 months ago

98
  • 2 answers

Zehra Mustafa 7 years, 8 months ago

Ansh are you of olf

Sanjana Yadav 7 years, 8 months ago

Ansh tum jo class 9 me the

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