₹ 5 coins were made by melting a soild cuboidal block of metal with dimensions `16 times 11 times 10` in cm. How many coins of thickness 2 mm and diameter 2 cm can be made. `(pi=22/7)`

Bricks of dimensions 15 cm times 8 cm times 5 cm are used to build a wall of dimensions 120 cm times 16 cm times 200 cm . How many bricks are used?

A metal parallelopiped of measure 16 cm times 11 cm times 10 cm was melted to make coins. How many coins were made if the thickness and diameter of each coin was 2 mm and 2 cm respectively?

Oil tins of cuboidal shape are made from a metallic sheet with length 8 m and breadth 4 m. Each tin has dimensions 60 times 40 times 20 in cm and is open from the top. Find the number of such tins that can be made?

How many solid cylinders of radius 6 cm and height 12 cm can be made by melting a solid sphere of radius 18 cm? Activity: Radius of the sphere, r = 18 cm For cylinder, radius R = 6 cm, height H = 12 cm therefore Number of cylinders can be made =("Volume of the sphere")/(square) =((4)/(3)pir^(3))/(square) =((4)/(3)xx18xx18xx18)/(square) =square

A tin maker converts a cubical metallic box into 10 cylindrical tins. Side of the cube is 50 cm and radius of the cylinder is 7 cm. Find the height of each cylinder so made if the wastage incurred was 12%. (pi = 22/7)

The radius and height of cylindrical water reservoir is 2.8 m and 3.5 m respectively. How much maximum water can the tank hold? A person needs 70 liters ofr water per day. For how many persons is the water sufficient for a day? (pi = 22/7. ) .

How many solid cylinders of radius 10 cm and height 6 cm can be made by melting a soilid sphere of radius 30 cm?

Some plastic balls of radius 1 cm were melted and cast into a tube. The thickness, length and outer radius of the tube were 2 cm, 90 cm, and 30 cm respectively. How many balls were melted to make the tube?

A nylon rope of 2 cm in diameter has a breaking strength of 1.5 xx 10^(5) N . The breaking strength of a similar rope of 1cm in diameter is

Same quantity of ice is filled in each of the two metal containers P and Q having the same size, shape and wall thickness but made of different materials. The containers are kept in identical surroundings. The ice in P melts completely in time t_1 , whereas that Q in takes a time t_2 . The ratio of thermal conductivities of the materials of P and Q is