Advertisements
Advertisements
प्रश्न
A cuboidal block of silver is 9 cm long, 4 cm broad and 3.5 cm in height. From it, beads of volume 1.5 cm3 each are to be made. Find the number of beads that can be made from the block.
Advertisements
उत्तर
Length of the cuboidal block of silver = 9 cm
Breadth = 4 cm
Height = 3 . 5 cm
\[\text { Now, volume of the cuboidal block = length } \times \text { breadth } \times \text { height }\]
\[ = 9 \times 4 \times 3 . 5 \]
\[ = 126 {cm}^3 \]
\[ \therefore \text { The required number of beads of volume 1 . 5 } {cm}^3\text { that can be made from the block }= \frac{\text { volume of the silver block }}{\text { volume of one bead }}\]
\[ = \frac{126 {cm}^3}{1 . 5 {cm}^3}\]
\[ = 84\]
संबंधित प्रश्न
The paint in a certain container is sufficient to paint an area equal to 9.375 m2. How many bricks of dimensions 22.5 cm × 10 cm × 7.5 cm can be painted out of this container?
Water is pouring into a cubiodal reservoir at the rate of 60 litres per minute. If the volume of the reservoir is 108 m3, find the number of hours it will take to fill the reservoir.
A closed iron tank 12 m long, 9 m wide and 4 m deep is to be made. Determine the cost of iron sheet used at the rate of Rs. 5 per metre sheet, sheet being 2 m wide.
A milk container is 8 cm long and 50 cm wide. What should be its height so that it can hold 4 litres of milk?
The cost of preparing the walls of a room 12 m long at the rate of Rs 1.35 per square metre is Rs 340.20 and the cost of matting the floor at 85 paise per square metre is Rs 91.80. Find the height of the room.
The length, width and height of a rectangular solid are in the ratio of 3 : 2 : 1. If the volume of the box is 48cm3, the total surface area of the box is
Total surface area of a box of cuboid shape is 500 sq. unit. Its breadth and height is 6 unit and 5 unit respectively. What is the length of that box ?
The length, breadth, and height of a room are 6 m, 5.4 m, and 4 m respectively. Find the area of :
(i) its four-walls
(ii) its roof.
The dining-hall of a hotel is 75 m long; 60 m broad and 16 m high. It has five – doors 4 m by 3 m each and four windows 3 m by 1.6 m each. Find the cost of :
(i) papering its walls at the rate of Rs.12 per m2;
(ii) carpetting its floor at the rate of Rs.25 per m2.
Find the height of the cylinder whose radius is 7 cm and the total surface area is 1100 cm2.
