Tiwari Academy Discussion

Asked: November 5, 2020In: Class 9

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine:

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.1 Page No:213 Questions No:1 (i) The area of the sheet required ...

Anand Singh

Asked: November 5, 2020In: Class 9

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m².

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.1 Page No:213 Questions No:2

Anand Singh

Asked: November 5, 2020In: Class 9

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs 10 per m² is Rs 15000, find the height of the hall.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.1 Page No:213 Questions No:3

Jagannath Dixit

Asked: November 5, 2020In: Class 9

Find the radius of a sphere whose surface area is 154 cm².

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:6

Jagannath Dixit

Asked: November 5, 2020In: Class 9

A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm².

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:5

Jagannath Dixit

Asked: November 5, 2020In: Class 9

The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:4

Jagannath Dixit

Asked: November 5, 2020In: Class 9

Find the surface area of a sphere of diameter: 3.5 m.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:2 Part:3

Jagannath Dixit

Asked: November 5, 2020In: Class 9

Find the surface area of a sphere of diameter: 21 cm.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:2 Part:2

Jagannath Dixit

Asked: November 5, 2020In: Class 9

Find the surface area of a sphere of diameter: 14 cm.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:2 Part:1

Jagannath Dixit

Asked: November 5, 2020In: Class 9

Find the surface area of a sphere of radius: 14 cm.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2020-2021 CBSE Board, UP Board and Other state Boards EXERCISE 13.4 Page No:225 Questions No:1 Part:3

A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine:

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m².

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs 10 per m² is Rs 15000, find the height of the hall.

Find the radius of a sphere whose surface area is 154 cm².

A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm².

The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

Find the surface area of a sphere of diameter: 3.5 m.

Find the surface area of a sphere of diameter: 21 cm.

Find the surface area of a sphere of diameter: 14 cm.

Find the surface area of a sphere of radius: 14 cm.

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