NCERT Class 8 Mathematics Solutions: Chapter 11 –Mensuration Exercise 11.2 Part 1

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Introduction to mensuration

Introduction to Mensuration

Introduction to mensuration

1. The shape of the top surface of a table is a trapezium. Find its area if its parallel sides are and perpendicular distance between them is .

Answer:

Shape of the Top Surface of a Table is a Trapezium

The shape of the top surface of a table is a trapezium, parallel sides are 1 m and 1.2 m, and perpendicular distance between them is 0.8 m

One parallel side of the trapezium

And second side

And Height

Area of top surface of the table

So, the surface area of the table is .

2. The area of a trapezium is and the length of one of the parallel sides is and its height is . Find the length of the other parallel side.

Answer:

Consider the length of the other parallel side be .

Length of one parallel side

And height

Area of trapezium

So, the another required parallel side is .