A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.
(i) What is the area of the glass?
(ii) How much of tape is needed for all the 12 edges?
Archives for March 2014
Ncert Math Solutions Class 9th Chapter 13 Surface Areas and Volumes Exercise 13.1 Question 5
A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.
(i) Which box has the greater lateral surface area and by how much?
(ii) Which box has the smaller total surface area and by how much?
Ncert Math Solutions Class 9th Chapter 13 Surface Areas and Volumes Exercise 13.1 Question 4
The paint in a certain container is sufficient to paint an area equal to 9.375
. How many bricks of dimensions 22.5 cm × 10 cm × 7.5 cm can be painted out of this container?
Ncert Math Solutions Class 9th Chapter 13 Surface Areas and Volumes Exercise 13.1 Question 3
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
is Rs 15000, find the height of the hall.
Ncert Math Solutions Class 9th Chapter 13 Surface Areas and Volumes Exercise 13.1 Question 2
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
.
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