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RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2

March 23, 2019 by Fazal 1 Comment

RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 is part of RBSE Solutions for Class 8 Maths. Here we have given Rajasthan Board RBSE Class 8 Maths Chapter 14 Area Exercise 14.2.

Board RBSE
Textbook SIERT, Rajasthan
Class Class 8
Subject Maths
Chapter Chapter 14
Chapter Name Area
Exercise Exercise 14.2
Number of Questions 3
Category RBSE Solutions

Rajasthan Board RBSE Class 8 Maths Chapter 14 Area Ex 14.2

Question 1.
Find the area of polygon according to the measurement given in the figure.
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-1
Solution:
Area of polygon JKLMN
= Area of figure 1 + Area of figure 2 + Area of figure 3 + Area of figure 4 + Area of figure 5
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-2
= 300 + 4400 + 1750 + 2600 + 1400
= 10450 meter²

RBSE Solutions

Question 2.
Each side of the hexagon ABCDEF has side of length 5 cm as given in the figure. Riya and Riema And the area of the region by dividing it into two parts in two different manner. Compare the area(RBSESolutions.com)in both the case.
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-3
Solution:
Ria’s Method
Area of hexagonal shape ABCDEF = Area of ∆AFE + Area of rectangle ∆EDB + Area of ∆BCD
= \(\frac { 1 }{ 2 }\) x 8 x 3 + 8 x 5 + \(\frac { 1 }{ 2 }\) x 8 x 3
= 12 + 40 + 12
= 64 cm²
Raima’s Method
Area of hexagonal shape ABCDEF
= Area of(RBSESolutions.com)trapezium ABCF + Area of trapezium FCDE
= \(\frac { 1 }{ 2 }\) x (5 + 11) x 4 + \(\frac { 1 }{ 2 }\) x (5 + 11) x 4
= 32 + 32
= 64 cm²
Hence, both areas are same.

RBSE Solutions

Question 3.
The measurement of each part of the farm of Ramlal is given in the figure. Find the total cost of ploughing at the rate of Rs. 4 per meter.
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-4
Solution:
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-5
Area of field = Area of figure 1 + Area of figure 2 + Area of figure 3 + Area of figure 4 + Area of figure 5 + Area of figure 6
RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 img-6
= 3575 + 3600 + 700 + 2450 + 6600 + 2625
= 19550 meter²
Cost of ploughing at the rate of = Rs 4 per meter
Cost of ploughing to 19550 sq. unit(RBSESolutions.com)farm = 19550 x 4 = Rs 78,200
Hence the required cost = Rs 78,200

RBSE Solutions

We hope the given RBSE Solutions for Class 8 Maths Chapter 14 Area Ex 14.2 will help you. If you have any query regarding Rajasthan Board RBSE Class 8 Maths Chapter 14 Area Exercise 14.2, drop a comment below and we will get back to you at the earliest.

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