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3 results found for "friends conversation" in Class 10.

दो मित्र मिलकर (12 days) में काम पूरा करते हैं। पहला मित्र अकेले दूसरे से (10 days) कम समय लेता है। पहला मित्र अकेले कितने दिन लेगा?

Two friends together complete a work in (12 days). The first friend alone takes (10 days) less than the second. How many days will the first friend alone take?

Explanation opens after your attempt
Correct Answer

A. (20 days)

Step 1

Concept

Let the first friend's time be (x), so the second's is (x+10), and \(\frac{1}{x}+\frac{1}{x+10}=\frac{1}{12}\). This gives \(x^2-14x-120=0\), so (x=20).

Step 2

Why this answer is correct

The correct answer is A. (20 days\(). Let the first friend's time be (x), so the second's is (x+10), and (\frac{1}{x}+\frac{1}{x+10}=\frac{1}{12}). This gives (x^2-14x-120=0), so (x=20).\)

Step 3

Exam Tip

पहले का समय (x) हो, तो दूसरे का (x+10) है और \(\frac{1}{x}+\frac{1}{x+10}=\frac{1}{12}\)। इससे \(x^2-14x-120=0\), इसलिए (x=20)।

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दो मित्रों की आयु का योग (44) है और उनके आयुओं का गुणनफल (480) है। बड़े मित्र की आयु क्या है?

The sum of ages of two friends is (44) and the product of their ages is (480). What is the age of the older friend?

Explanation opens after your attempt
Correct Answer

A. (24)

Step 1

Concept

If one age is (x), the other is (44-x). From (x(44-x)=480), the ages are (24) and (20).

Step 2

Why this answer is correct

The correct answer is A. (24). If one age is (x), the other is (44-x). From (x(44-x)=480), the ages are (24) and (20).

Step 3

Exam Tip

यदि एक आयु (x) है, तो दूसरी (44-x) है। (x(44-x)=480) से आयु (24) और (20) मिलती हैं।

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दो मित्रों की आयु का योग (40) है और उनके आयुओं का गुणनफल (375) है। बड़े मित्र की आयु क्या है?

The sum of ages of two friends is (40) and the product of their ages is (375). What is the age of the older friend?

Explanation opens after your attempt
Correct Answer

A. (25)

Step 1

Concept

If one age is (x), the other is (40-x). From (x(40-x)=375), the ages are (25) and (15).

Step 2

Why this answer is correct

The correct answer is A. (25). If one age is (x), the other is (40-x). From (x(40-x)=375), the ages are (25) and (15).

Step 3

Exam Tip

यदि एक आयु (x) है, तो दूसरी (40-x) है। (x(40-x)=375) से आयु (25) और (15) मिलती हैं।

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