Measurement Concepts and Units

The video tutorial introduces the concept of measurement through a story, explaining how different units like arm length, cubit, and hand span can vary based on the person measuring. It emphasizes the importance of standard units such as centimeters, inches, and kilograms for consistent measurement. The tutorial also covers volume measurement using liters, highlighting the need for fixed units to ensure accuracy regardless of who measures.

Why is it not reliable to use arm length for measuring objects?

• Arm length is a standard unit of measurement.

• Arm length is longer than a meter.

• Arm length is the same for everyone.

• Arm length varies between individuals.

What is the problem with using a cubit for measurement?

• It is too long.

• It varies with the height of the person.

• It is a standard unit.

• It is too short.

What is a hand span?

• The distance between the tip of the thumb and the small finger.

• The length of a person's arm.

• The width of a person's hand.

• The distance from the elbow to the wrist.

What is the problem with using a hand span for measurement?

• It is too short.

• It is a standard unit.

• It is too long.

• It varies with the size of the hand.

Why is a ruler more reliable than using hand spans for measuring length?

• A ruler is a fixed length.

• A ruler is flexible.

• A ruler is longer than a hand span.

• A ruler is made of metal.

What is the benefit of using a scale for measurement?

• It is made of metal.

• It is flexible.

• It is longer than a meter.

• It provides consistent results.

What is the standard unit of weight?

• Pound

• Gram

• Ounce

• Kilogram

How much less rice did Rajan receive than he paid for?

• 4 kg

• 2 kg

• 5 kg

• 3 kg

What is the equivalent of 1 kg in terms of metal weight?

• 1 kg metal weight

• 2 kg metal weight

• 10 kg metal weight

• 5 kg metal weight

How do we know if Rajan was deceived with the rice purchase?

• By measuring the weight of the rice.

• By tasting the rice.

• By checking the color of the rice.

• By counting the grains.