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Raavi Tiwari
@raavi-tiwari
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Joined: May 7, 2021
Last seen: Jun 14, 2021
Topics: 0 / Replies: 2064
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Answer to: Five years hence, the age of Jacob will be three times that of his son. Five years ago, Jacob’s age was seven times that of his son. What are their present ages?

Let the age of Jacob and his son be x and y respectively. According to the question, (x + 5) = 3(y + 5) x – 3y = 10 …………………….. (1) (x – 5) = 7...

5 years ago
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Answer to: A fraction becomes 9/11 if 2 is added to both the numerator and the denominator. If, 3 is added to both the numerator and the denominator it becomes 5/6. Find the fraction.

Let the fraction be x/y. According to the question, (x+2)/(y+2) = 9/11 11x + 22 = 9y + 18 11x – 9y = -4 …………….. (1) (x+3) /(y+3) = 5/6 6x ...

5 years ago
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Answer to: The taxi charges in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs 105 and for a journey of 15 km

Let the fixed charge be Rs x and per km charge be Rs y. According to the question, x + 10y = 105 …………….. (1) x + 15y = 155 …………….. (2) From (1...

5 years ago
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Answer to: The coach of a cricket team buys 7 bats and 6 balls for Rs.3800. Later, she buys 3 bats and 5 balls for Rs.1750. Find the cost of each bat and each ball.

Let the cost a bat be x and cost of a ball be y. According to the question, 7x + 6y = 3800 ………………. (i) 3x + 5y = 1750 ………………. (ii) From (i), w...

5 years ago
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Answer to: The larger of two supplementary angles exceeds the smaller by 18 degrees. Find them.

Let the larger angle by x° and smaller angle be y°. We know that the sum of two supplementary pair of angles is always 180o. According to the ques...

5 years ago
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Answer to: The difference between two numbers is 26 and one number is three times the other. Find them.

Let the two numbers be x and y respectively, such that y > x. According to the question, y = 3x ……………… (1) y – x = 26 …………..(2) Substitutin...

5 years ago
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Answer to: Solve 2x + 3y = 11 and 2x – 4y = – 24 and hence find the value of ‘m’ for which y = mx + 3.

2x + 3y = 11 ……………………..(i) 2x – 4y = -24 …………………… (ii) From equation (ii), we get x = (11-3y)/2 ………………….(iii) Substituting the value of x in e...

5 years ago
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Answer to: Solve the following pair of linear equations by the substitution method (i) 0.2x + 0.3y = 1.3 0.4x + 0.5y = 2.3 (ii) √2 x+√3 y = 0 √3 x-√8 y = 0

(i) Given, 0.2x + 0.3y = 1.3 and 0.4x + 0.5y = 2.3 are the two equations. From 1st equation, we get, x = (1.3- 0.3y)/0.2 _______(1) Now, subst...

5 years ago
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Answer to: Solve the following pair of linear equations by the substitution method (i) x + y = 14 x – y = 4 (ii) s – t = 3 (s/3) + (t/2) = 6

(i) Given, x + y = 14 and x – y = 4 are the two equations. From 1st equation, we get, x = 14 – y Now, substitute the value of x in second equa...

5 years ago
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Answer to: Draw the graphs of the equations x – y + 1 = 0 and 3x + 2y – 12 = 0. Determine the coordinates of the vertices of the triangle formed by these lines and the x-axis, and shade the triangular region.

Given, the equations for graphs are x – y + 1 = 0 and 3x + 2y – 12 = 0. For, x – y + 1 = 0 or x = 1+y x 0, 1, 2 y 1, 2, 3 For, 3x + 2y – 12 ...

5 years ago
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Answer to: Make a list of at least ten occupations in the city, town, or village to which you belong, and find out how long they have existed. What does this tell you about the changes within this area?

I live in a village, I find here the following occupations in which villagers are engaged: Farming Fishing Teaching Carpentry Grocery Vending...

5 years ago
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Answer to: Find out the history of the town you live in or of any town nearby. Check when and how it grew, and how it has changed over the years.

Monu Nagar (An Imaginary Town): 1. Monu Nagar was a small village along G.T. Road. 2. People in the village lived a simple life, mostly of the agr...

5 years ago
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Answer to: How did the partition affect life in Delhi?

India got partitioned in 1947 and this led to a massive transfer of populations on both sides of the new border. As a result, the population of Delhi ...

5 years ago
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