NCERT Class 7 Mathematics Model Paper 2 Questions and Answers Part 6 (For CBSE, ICSE, IAS, NET, NRA 2022)

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37. If 3 articles are sold for the cost price of 4, then what is the profit percentage?

OR

A man bought a car for ₹ 60,000 and spent 10 % of the cost of the car for the purchase of new tires. At what price should he sell the car to make a gain of 15 % ?

Ans:

Let the C. P. of 1 article = Re 1. Then, S. P. of 3 articles = C. P. of 4 article = ₹ 4 C. P of 3 articles = ₹ 3 Profit = ₹ 4 – ₹ 3 = Re 1. Profit %= 1 3 × 100 = 33 1 3 %

OR C. P of car = ₹ 60,000

Amount spent on purchase of new tires = 10 % of cost of car

Total cost price = 60,000 + 6000 = ₹ 66,000 Profit %= 15 %

The price at which he must sell the car

38. A man left 25 % of his money to his mother, 55 % to his daughter and the remaining ₹ 9000 to his brother. How much money did he leave? Find the shares of his mother and daughter.

OR

Find the value of x if

(i) 8 % of ₹ x is ₹ 100.

(ii) 32 % of x kg is 400 kg.

(iii) 35 % of ₹ x is ₹ 280.

(iv) 45 % of x marks is 405.

Ans:

Let man has initially ₹ x

Mother

Daughter

Mother՚s share

Daughter՚s share

OR

(i)

(ii)

(iii)

(iv)

39. Draw the net of:

(i) A cube

(ii) A triangular prism

(iii) A triangular pyramid

(iv) A cylinder

(i)

Net of a Cube

(ii)

Net of a Triangular Prism

(iii)

Net of a Triangular Pyramid

(iv)

Net of a Cylinder

40. ABCD is a square field of side 80 m. If EF is perpendicular to DC, find the area of ′ EDC. Also, find the area of the shaded portion.

ABCD is a Square Field

Ans:

ABCD is a Square Field

Area of square

Area of

So, area of shaded portion

= Area of square – Area of