Class 5 Exam  >  Class 5 Notes  >  Mathematics for Class 5: NCERT  >  Important Questions: How Big, How Heavy

Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy

Q1: Find the number of cubes in the base layer of the following figure:
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans: 
The number of cubes in the base layer of the given figure = 6
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy 


Q2: Count the number of cubes in the given shape
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans: Total cubes in given figure are :11


Q3: Count the number of cubes in the given shape
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans:
Total cubes in given figure are: 9


Q4: Count the number of cubes in the given shape.
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans: 
Total cubes in given figure are :110


Q5: Count the number of cubes in the given shape
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy 
Ans: Total cubes in given figure are :113


Q6: Solid spheres of diameter 6 cm are dropped into a cylindrical beaker containing some water and are fully submerged. If the diameter of the beaker is 18cm and the water rises by 40cm, find the number of solid spheres dropped in the water.
Ans: By volume conservation we can say that the amount of water displaced by solid sphere is equal to the volume of spheres being dropped inside the cylindrical beaker.
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy where x is the number of spheres
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy where r = 3 and R = 9
On solving,
x = 90


Q7: How many lead cubes of side 2 cm could be made from a lead cube of side 8 cm?
Ans:
Let x be the number of lead cubes of side 2 cm
Since all the smaller lead cubes are formed from the bigger lead cube of side 8 cm
⟹ Number of smaller lead cubes × volume of each lead cube = volume of bigger lead cube
⟹ x × (2)3 = (8)3 [∵ Volume of cube of edge length a is a3]
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
⟹x = 64
∴ 64 smaller lead cubes can be made form the bigger lead cube


Q8: Count the number of cubes and find the volume in cu. cm.
(Let the side of each cube = a)

Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans: We observe that the number of cubes present = 10
Given:  Side of each cube = a
Total volume = 10 × a3
=10a


Q9: Count the number of cubes in the given shape
Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy
Ans:
Total cubes in given figure are :10


Q10: Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16cm × 8cm × 8cm. When 16 spheres are packed the box is filled with preservative liquid. Find the volume of this liquid (in cm3). Give your answer to the nearest integer. [Use π = 3.14]
Ans: 
Volume of rectangular box = lbh = 16 (64) = 1024 cm3
Volume of sphere = 4/3 πr3 = 33.5238 cm
16 sphere = 16 (33.5238) = 536.3808
Volume of liquid = 1024 − 536.3808 = 488 cm3

The document Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy is a part of the Class 5 Course Mathematics for Class 5: NCERT.
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FAQs on Class 5 Maths Chapter 14 Important Question Answers - Chapter 14 - How Big How Heavy

1. How big is a Class 5 vehicle and what are its weight limitations?
Ans. A Class 5 vehicle typically refers to a medium-duty truck with a Gross Vehicle Weight Rating (GVWR) ranging from 16,001 to 19,500 pounds. The weight limitations may vary depending on the specific regulations of different regions, but generally, Class 5 vehicles are designed to carry loads up to their designated GVWR.
2. What are the common uses for Class 5 trucks?
Ans. Class 5 trucks are commonly used for various purposes such as delivery trucks, utility trucks, box trucks, flatbed trucks, tow trucks, and small dump trucks. Their versatility makes them suitable for a wide range of industries including transportation, construction, and logistics.
3. Can a regular driver's license be used to operate a Class 5 vehicle?
Ans. In many regions, a regular driver's license is sufficient to operate a Class 5 vehicle. However, it is essential to check the specific requirements of your local jurisdiction as some places may require a commercial driver's license (CDL) or additional endorsements based on the vehicle's weight or nature of the cargo being transported.
4. What are the advantages of Class 5 trucks over other classes?
Ans. Class 5 trucks offer several advantages compared to other classes. They provide a balance between size and maneuverability, making them suitable for urban environments. Class 5 trucks also have a higher payload capacity compared to lighter classes, allowing for more substantial loads to be transported. Additionally, their cost of ownership and operation is generally lower compared to heavier commercial vehicles.
5. Are there any specific safety regulations or requirements for Class 5 vehicles?
Ans. Yes, there are specific safety regulations and requirements for Class 5 vehicles. These may include mandatory inspections, maintenance schedules, weight restrictions, and adherence to safety equipment standards. It is crucial for operators to familiarize themselves with the safety regulations in their region and ensure compliance to ensure the safe operation of Class 5 vehicles.
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