Chapter 10. Mensuration CBSE Class VI (6th) Mathematics | Exercise 10.3 - Solutions

Things to remember...

• Area of a rectangle = length × breadth
• Area of the square = side × side

Question 1. Find the areas of the rectangles whose sides are :
(a) 3 cm and 4 cm
(b) 12 m and 21 m
(c) 2 km and 3 km
(d) 2 m and 70 cm

Chapter 10. Mensuration | CBSE Class 6th (VI) Mathematics | Exercise 10.2 - Solutions

Things to remember...

• The amount of surface enclosed by a closed figure is called its area.
• Surface Area of a figure  can be broken into exact numbers or approximate numbers of square units
• Depending upon the figure, some of square units may be completely covered, or partially covered.
• While using a squared paper, to calculate the area of a figure , we may use the  conventions :

Chapter 10. Mensuration | CBSE Class 6th (VI) Mathematics | Exercise 10.1 - Solutions

Things to remember...

• Perimeter is the distance covered once along the boundary of a closed figure .
• Perimeter of a rectangle = 2 × (length + breadth)
• Perimeter of a square = 4 × length of a side
• Perimeter of an equilateral triangle = 3 × length of a side

Question 1. Find the perimeter of each of the following figures :

Chapter 11. Work and Energy - Science | MCQ - Multiple Choice Questions | CBSE Class 9th

Question 1. A dog weighing 25 kg, while chasing a cat, jumps over a fence of height 1.6 m. What is the potential energy of dog at the top of fence ?
(Take gravity due to earth 'g'=10 m s^-2 )

(a) 160 Joules
(b) 320 Joules
(c) 380 Joules
(d) 480 Joules

Answer. (c) 380 Joules