Worksheet Solutions: The Junk Seller - 1 | Mathematics for Class 4: NCERT PDF Download

Q: Answer the following Questions.

(i) Mahesh runs a tea stall and earns Rs 40 in a day. how much will he earn in:
(a) In 10 days.
(b) In a month of 30 days. 
Ans: (a)Rs 400, (b) Rs 1200.

(ii) Put these amounts of money in order from smallest to largest.
(a) ₹ 8.10,    ₹ 8.50,        ₹ 8.75,     ₹ 8.45
_______, _______, _______, _______
(b) ₹ 1050, ₹ 1500,      ₹ 1005,       ₹ 5010
_______, _______, _______, _______
Ans: 
(a) 8.10, 8.45, 8.50, 8.75
(b) 1005, 1050, 1500, 5010

(iii) Find the value of the following notes:
(a) 5 notes of Rs. 100 =_______________
(b) 12 notes of Rs. 5 =________________
(c) 10 notes of Rs. 10 =_______________
(d) 15 notes of Rs. 50= _______________
(e) 6 notes of Rs. 500=_______________
(f) 8 notes of Rs. 20=________________
(g) 14 notes of Rs. 2=________________
Ans: 
(a) Rs 500
(b) Rs 60
(c) Rs 100
(d) Rs 750
(e) Rs 3000
(f) Rs 160
(g) Rs 28

(iv) State true of false 
if 20 × 5 = 100
20 × 50 = 1000
then  2 × 50 = 100 
Ans: True

(v) How many 10 rupees and 20 rupees notes are required to make Rs 190?
Ans: It can be any pair of 10 and 20 rupees notes (1, 9) (3, 8) (5, 7) (7, 6) (9, 5) (11, 4) (13, 3) (15, 2) (17, 1).
You can use a combination of ₹10 and ₹20 notes to make a total of ₹190. To solve this, different pairs of notes can be used. For example:

• 1 ₹10 note + 9 ₹20 notes (10 + 180 = ₹190)
• 3 ₹10 notes + 8 ₹20 notes (30 + 160 = ₹190)
• 5 ₹10 notes + 7 ₹20 notes (50 + 140 = ₹190) And so on.

There are several possible combinations, allowing flexibility in choosing different numbers of ₹10 and ₹20 notes, as long as they sum to ₹190.

(vi) Preeti earns ₹ 120 a day. How much will she earn in a month of 30 days?
Ans: Earnings by the number of days in the month:

$120\times 30=3600120\; \backslash times\; 30\; =\; 3600$

So, Preeti will earn ₹3600 in a 30-day month.

(vii) Cost of one toy is Rs.6. Ram bought 5 toys. He gave Rs 50 to the shopkeeper. How much money should he get back?
Ans: He will set Rs 20 back.

(viii) Read the table:

Sunil cleaned his home and collected all the waste. Later he went to a junk seller and sold 3 kgs of newspaper, notebook, iron and plastic each. How much will the junkseller pay to Sunil?
Ans: 

• 3 kgs of newspaper: 5 rupees per kg × 3 kgs = 15 rupees
• 3 kgs of notebooks: 3 rupees per kg × 3 kgs = 9 rupees
• 3 kgs of iron: 10 rupees per kg × 3 kgs = 30 rupees
• 3 kgs of plastic: 4 rupees per kg × 3 kgs = 12 rupees

Now, sum the amounts:
15 + 9 + 30 + 12 = 66 rupees

The junk seller will pay Sunil 66 rupees.

(ix) Look at the rate list and answer the following questions.

(a) Whose cost will be greater -  3 Kg aluminum or 2 Kg of brass?
(b) Whose cost will be lesser  -  4 Kg iron or 8 Kg of waste paper?
Ans: 
(a) 2 Kg of brass will have greater cost
(b) 8 Kg of waste paper

(x) Rama collected money in her piggy bank for 2 years. Now she has ₹ 978 in total. Does she has enough money to by a book on reptiles and a board game?
Board game - ₹ 315
Video game - ₹ 427
Plastic toy - ₹ 228
Story book - ₹ 400
Book on reptites - ₹ 660
Ans: ₹ 975, yes she has enough money to buy both the things

(xi) Mahesh earns Rs 90 per day by Working on fields. How much will he earn in:
(a) 5 days.
(b) 20 days.
(c) In a month of July.
Ans:
(a) Rs 450
(b) Rs 1800
(c) Rs 2790

(xii) Rakesh went to a stationary shop to buy a notebook, 2 pens, 5 chartpapers, plastic sheet, colours etc. The total cost of these items were ₹ 278. Rakesh gave ₹ 500 to the shopkeeper. How much change will he get back?
Ans: ₹ 222

(xiii) See the table and give your answers:

(a) Who paid lesser amount?
(b) Who paid greater amount and by how much?
(c) What will be their monthly installments?
Ans: 
(a) Debu paid lesser amount.
(b) Kali paid greater amount by Rs 270.
(c) Debu's monthly installment is Rs 305 and Kali's monthly installment is Rs 350.

(xiv) The cost of making 1 cup of tea is ₹ 4. Rina makes 30 cups of tea in a day in her tea stall. She sells each cup for ₹ 5. How much profit will  she earn in a week?
Ans: ₹ 1050

(xv) Kiran wrote the following record in her diary.
Fill the missing digits in her diary.
Ans: 
Rs. 600
Rs. 200
Rs. 60
Rs. 80
Rs. 10
Total = Rs. 950
Money she earned Rs. 200

(xvi) If 15 × 8 = 120 then,
15 × 80 =
Ans: 15 × 80 = 1200

(xvii) Anil and Sunil took a loan for six months each and the details of their payment is given below.
Anil paid total of Rs 300 after six months. Sunil paid an installment of Rs 52 per month for six months. Find out who paid more money?
Ans: Sunil has paid more money.

(xviii) Which is more: (Put >, < or = )
Ans: 

(xix) Complete the following table:

Ans: 
1. Profit = Rs 8
2. Profit = Rs 11
3. Profit = Rs 7
4. Profit = Rs 63
5. Loss = Rs 175
6. Loss = Rs 1

(xx) Garima counted her day earning by grouping the money she earned.

How much did she earn in total?
Ans: ₹ 554