Question

The shape of the base of cylinder is
5 Formula of the volume of cylinder is
82 Radius and height of cylinder is 7 cm each volume of cylinder is
The total surface area of a cube of side 3 cm =
The area of the front faces of the cuboid is
9) A cuboid with the equal length, breadth and height is cuboid a
2.2 Write true or false:-
1) The product of a rational number and its reciprocal is one. ( )
2) If the reciprocal of x is y the reciprocal of y is 1/x. ( )
3) The multiplicative inverse of a positive rational number is a a negative.
4) O is not the multiplication inverse of any number. ( )
Each of the questions given become relate to some property wri
7​

Answer 1

Answer:

1. circular
2. πr^2h
3. 1,309 cm^2
4. length*breadth
5. cube

    TRUE/FALSE

1. true
2. false
3. false
4. true

Answer 2

Answers:

Fill in the blanks:

1. The shape of the base of cylinder is circle.

2. Radius and height of cylinder is 7 cm each, the volume of cylinder is 1078 cm³.

3. The total surface area of a cube of side 3 cm is 54 cm².

4. The area of the front faces of the cuboid is 2 (lh + bh).

5.  A cuboid with the equal length, breadth and height is called a cube.

Step-by-Step explanations for each answer:

Part 1:

A prism with the top and bottom faces as the same 2D figure. A cylinder is also a prism with circles making the top and bottom faces.

Part 2:

Volume of a cylinder = πr²h

Radius = 7 cm, Height = 7 cm

$\sf{Volume=\dfrac{22}{7}\times7\times7\times7}$

$\sf{Volume=1078\:cm^3}$

Part 3:

$\sf{TSA=6a^2}$

$\sf{a=3\:cm}$

$\sf{TSA=6\times3\times3}$

$\sf{TSA=54\:cm^2}$

Part 4:

The longer and the broader faces of a cuboid have the formulas of lh and bh respectively. As there are two sets of these faces, the formula becomes 2 (lh + bh).

Part 5:

A cuboid with equal length, breadth and height is known as a cube as all sides are equal.

True or False:

1. The product of a rational number and its reciprocal is one. ----- True

2.  If the reciprocal of x is y the reciprocal of y is 1/x. ----- True

3. The multiplicative inverse of a positive rational number is a a negative. ----- False [The multiplicative inverse simply refers to the reciprocal and for a positive number it will be positive.]

4. 0 is not the multiplication inverse of any number. ----- True