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Let the speed of the stream be x km/hr Speed of the boat upstream=(5−x)km/hr Speed of the boat downstream=(5+x) km/hr Time taken for going 5.25km upstream = 5−x 5.25 hours Time taken for going 5.25km downstream = 5+x 5.25 hours Obviously, time taken for going 5.25km upstream is more than the time taken for going 5.25km, downstream It is given that the time taken for going 5.25km, upstream is 1 hour more than the time taken for going 5.25 downstream ∴ 5−x 5.25 − 5+x 5.25 =1 ⇒5.25{ 5−x 1 − 5+x 1 }=1⇒ 4 21 ( (5−x)(5+x) 5+x−5+x )=1 ⇒ 4 21 × 25−x 2 2x =1⇒ 2 21 × 25−x 2 x =1 ⇒2x 2 +21x−50=0 ⇒x(2x+25)−2(2x+25)=0⇒(2x+25)(x−2)=0 ⇒x−2=0,2x+25=0 ⇒x=2[∵x  = 2 −25 ] ∴ speed of the stream =2km/hr

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(2x⁴+3)³=(4x+4) (2x²+3)

Posted by Anshika Manekar 3 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Anshika Manekar 3 years, 2 months ago

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Manjeet Kumar 3 years, 3 months ago

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×2-2×-8

Posted by 尊重女孩尊重女孩 3 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Prince Bharti 3 years, 3 months ago

X=4 , -2

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Komal Singh 3 years, 3 months ago

Answer is 18

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When is ap

Posted by Suhani Kumari Kumari 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Vivek Prajapati 3 years, 2 months ago

2b=a+c

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If 2 and 3 are the roots of the equation 3x square -2kx +2m =0 find the values of k and m

Posted by Bobba Bobba Akshay 3 years, 3 months ago

CBSE > Class 10 > Mathematics

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Two cubes each of volume 27cmare joined end to end to form a solid find the surface of resulting cube

Posted by Anmolpreet Kaur 3 years, 3 months ago

CBSE > Class 10 > Mathematics

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(x)2+3x+4

Posted by Utkarsh Singh 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Sachin Kumar 3 years, 3 months ago

X=-4& X=1

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Ex 14.2

Posted by Akshu Saini 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Rishika Xth B 3 years, 3 months ago

Which question do u want to ask??

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JUST the solution for 4x+3y=5 and 3x-4y=2

Posted by Madhumita Nayak 3 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Vivek Prajapati 3 years, 2 months ago

x=26/25,y=7/25

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Raj Shaw 3 years, 3 months ago

(1-sinA+cosA) square

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Science???

Posted by Piyush Choudhari 3 years, 3 months ago

CBSE > Class 10 > Mathematics

3 answers

Piyush Choudhari 3 years, 3 months ago

No ...

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𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 3 months ago

Say something....

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𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 3 months ago

Yes

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What happened!!!!

Posted by Piyush Choudhari 3 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Piyush Choudhari 3 years, 3 months ago

Ok...

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𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 3 months ago

What happen

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FIND THE ROOTS OD 5y²-2y-2 by quadratic formula

Posted by Neeti Taank 3 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Farhaz Khan 3 years, 3 months ago

Use d = b^2 - 4ac where b = -2 , a= 5 ,c=-2 then Roots given by (-b +- d^1/2 )÷a

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Aditya Verma 3 years, 3 months ago

Use the quadratic formula

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The sum of number and its reciprocals is . Find the number.

Posted by Asmitdeep Deep 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Khushpreet Kaur 3 years, 3 months ago

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Let the number of toys produced on that day be x. Therefore,the cost of production ( in rupees) of each toy that day = 55 - x So,the total cost of production ( in rupees ) that day = x ( 55 -x )

Posted by Sakshi Pandey 3 years, 3 months ago

CBSE > Class 10 > Mathematics

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What is twin prime numbers

Posted by Flag Emote 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 3 months ago

:a pair of prime numbers (such as 3 and 5 or 11 and 13) differing by two.

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What is mathematics??

Posted by Piyush Choudhari 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 3 months ago

Mathematics is an area of knowledge that includes such topics as numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes.

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Ex 3.6 6questio

Posted by Lalita Jat 3 years, 3 months ago

CBSE > Class 10 > Mathematics