NCERT Class 7 Mathematics Model Paper 2 Questions and Answers Part 5

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33. A horse is tied with a rope in the center of a square lawn of size 20 cm. If the length of rope is 7 cm. Find the area of the lawn which the horse can graze. Also, find the unglazed area of the lawn.

OR

A rectangular lawn has two roads each 20 m wide running in the middle of it, one parallel to the length and other parallel to the breadth. Find the cost of gravelling them at `1.20 per sq. meter.

Ans:

Area of the lawn

Area of the Lawn

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Area of the lawn which the horse can graze

Area of the lawn which is ungrazed = Area of square lawn – Area of lawn which horse can graze i.e

Or

Area of Roads

Area of Roads

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Area of roads

Cost of gravelling

34. Find the line of symmetry in

(i) Parallelogram

(ii) Regular octagon

(iii) Isosceles triangle

Ans: (i) 0

(ii) 8

(iii) 1

Section – D

35. Construct a right-angled triangle ABC, right angled at B, and.

Ans:

Construct a right-angled triangle

Construct a Right-Angled Triangle

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Steps of construction:

1. Draw a line segment

2. Construct a angle at point B, .

3. Take another radius = 10 cm and cut an arc taking C as the center and which cuts XB at A.

4. Join AC. is the required right angle.

36. 12 workers working 8 hours a day complete the work in 16 days. In how many days will 16 workers working for 18 hours a day complete that work?

OR

`7000 is borrowed at 3.5% rate of interest per annum for 2 years. Find the amount to be paid at the end of second year.

Ans:

days.

OR

P = Rs.

years

Amount = P + S.I.

= Rs. 7000 + Rs. 490

= Rs. 7490