Mensuration is a branch of mathematics that mainly deals with the study of different kinds of Geometrical shapes along with their area, length, volume, and perimeters. It's completely based on the application of both algebraic equations and geometric calculations. The results which are obtained by the Mensuration are considered to be very accurate.
Q1. Find the perimeter of a rectangle whose length and breadth are 25 cm and 15 cm respectively.
Ans. The correct option is 3
Length of rectangle = 25cm Breadth of rectangle = 15cm
Perimeter = 2 (l + b) = 2(25+15) = 2 × 40 = 80cm.
Q2. Find the perimeter of a square whose side is 5 cm
Ans. The correct option is 4
Side of square = 5cm
Perimeter of square = 4 × side, perimeter = 4 × 5 = 20cm
Q3. Find the side of a square whose perimeter is 100 cm
Ans. The correct option is 2
Perimeter of square = 100cm
Side = Perimeter/4 = 100/4 = 25cm
Q4. Find the cost of fencing a square park of side 300m at the rate of Rs 20 per metre.
Ans. The Correct option is 1
Side of square park = 300m
Perimeter = 4 x side = 4 x 300 = 1200m
Cost of fencing 1200 metre at the rate of Rs 20 per metre = 20 × 1200 = Rs 24000
Q5. Find the perimeter of an equilateral triangle of side 9cm.
Ans. The correct option is 3
Side of an equilateral triangle = 9 cm
All three sides of equilateral triangle are equal. So, perimeter = 3 × side = 3 × 9 = 27cm.
Q6. Find the area of a rectangle whose length is 4cm and breadth is 2cm.
Ans. The correct Option is 1 Length of rectangle = 4 cm Breadth of rectangle = 2cm
Area of rectangle = l × b = 4 × 2 = 8 cm^{2}
Q7. Find the area of a rectangle if its length and breadth are 28cm and 120mm respectively.
Ans. The correct option is 1
Length of rectangle = 28cm Breadth of rectangle = 120mm
1cm = 10mm, 28cm = 28 × 10 = 280mm so, length = 280mm
area = l × b = 280 × 120 = 3360 mm^{2}
Before solving the worksheet of Physics Wallah it is highly recommended to read the theory of the chapter and solve the questions given in your textbook. For reference, students can also check the CBSE Class 6 maths notes which are prepared by an expert team of Physics Wallah. Do visit NCERT Solutions for class 6 maths which has the best solutions among all other websites.