Bzzii is an online learning platform designed for middle and high school students, from grades 7 to 12. We provide a fun and interactive way to practice your skills and prepare for success.
5 PENCILS and 7 PENS together Cost Rs. 50, Whereas 7 Pencils and 5 Pens together Cost Rs. 46. Find the Cost of One Pencil and that of One pen by Graphical Method | Bzziii.com
Get link
Facebook
X
Pinterest
Email
Other Apps
By
admin
-
5 pencils and 7 pens together cost Rs. 50, whereas 7 pencils and 5 pens together cost Rs. 46. Find the cost of one pencil and that of one pen by graphical method.
Let the Cost of one pencil be Rs x
and Cost of one Pen be Rs y
Given that,
5 Pencils and 7 Pens together cost Rs 50
5 `\times` (Cost of Pencils) + 7 `\times` (Cost of Pens) = 50
5x + 7y = 50 .....(1)
Also, 7 Pencils and 5 Pens together cost Rs. 46
7 `\times` (Cost of Pencils) + 5 `\times` (Cost of Pens) = 46
7x + 5y = 46 .....(2)
Now, Plotting equations,
5x + 7y = 50 .....(1)
7x + 5y = 46 .....(2)
Now, for equation (1)
5x + 7y = 50
x
3
0
y
5
7.14
Let y = 5
5x + 7y = 50 5x + 7(5) = 505x + 35 = 505x = 50 - 355x = 15x = `15/5`So, x = 3, y = 5 is a solution i.e. (3,5) is a solution Let x = 0 5x + 7y = 505(0) + 7y = 50
0 + 7y = 50
7y = 50
y = `50/7`
So, x = 0, y = 7.14 is a solution i.e. (0,7.14) is a solution
Now, for equation (2)
7x + 5y = 46
x
6.57
3
y
0
5
Let y = 0
7x + 5y = 46
7x + 5(0) = 46
7x + 0 = 46
7x = 46x = `46/7`x = 6.57So, x = 6.57, y = 0 is a solution i.e. (6.57,0) is a solution Let x = 3
7x + 5y = 46
7(3) + 5y = 46
21 + 5y = 46
5y = 46 - 215y = 25y = `25/5`y = 5
So, x = 3, y = 5 is a solution i.e. (3,5) is a solution
answer source Question Read the source given below and answer the questions that follows: Source : The Movement in the Towns The movement started with middle-class participation in the cities. Thousands of students left government-controlled schools and colleges, headmasters and teachers resigned, and lawyers gave up their legal practices. The council elections were boycotted in most provinces except Madras, where the Justice Party, the party of the non-Brahmans, felt that entering the council was one way of gaining some power–something that usually only Brahmans had access to. The effects of non-cooperation on the economic front were more dramatic. Foreign goods were boycotted, liquor shops picketed, and foreign cloth burnt in huge bonfires. The import of foreign cloth halved between 1921 and 1922, its value dropping from Rs. 102 crore to Rs. 57 crore. In many places merchants and traders refused to trade in foreign goods or finance foreign trade. As the boycott movement spread...
Read the following passage. At the shop there was a well-dressed customer. He bent down and asked the little girl, “What kind of a miracle does your brother need? “I don’t know,” she replied with her eyes welling up. “He’s really sick and Mummy says he needs an operation. But my Daddy can’t pay for it, so I have brought my savings.” “How much do you have?” asked the man. “One dollar and eleven cents, but I can try and get some more,” she answered barely audible. Answer the following questions. 1) Who do you think is the ‘well-dressed customer’ at the shop? 2) What did the well-dressed man ask the little girl? 3) “He’s really sick.” Who does title word ‘he’ refer to here ? What is he to Tess? 4) What did he need urgently? 5) How much money did the little girl have with her? SOLUTION 1. I think the well-dressed customer at the shop is Dr. Carlton Armstrong. 2. The well-dressed man asked the little girl what kind of a miracle her brother needed. 3. The word ‘he’ refers to A...
A trading firm’s average inventory is Rs 20,000 (cost). If the inventory turnover ratio is 8 times and the firm sells goods at a profit of 20% on sale, ascertain the profit of the firm. SOLUTION Inventory Turn Over Ratio Or,8 Or, Cost of Revenue from Operations = 20,000 ❌ 8 = 1,60,000 Let Sales Price be Rs. 100 ∴ Profit is Rs.20 Hence, the Cost of Revenue from Operations = Rs. 100 - Rs. 20 = Rs. 80 If the Cost of Revenue from Operations = Rs. 100 - Rs. 20 = Rs. 80 If the Cost of Revenue from Operations is Rs. 80, then Revenue from Operations = 100 If the Cost of Revenue from Operations is Rs. 1, then Revenue from Operations = ` `\frac{100}{8}` ` If the Cost of Revenue from Operations is Rs. 1,60,000 then, Revenue from Operations = ` `\frac{100}{8}\times1,60,000` ` = 2,00,000 Now, Profit = Net Revenue from Operations - Cost of Revenue from Operations = 2,00,000 - 1,60,000 = 40,000 Alternative Method: Stoc...
Comments
Post a Comment