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9th CBSE
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A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?

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Important Questions on Surface Area and Volume of a Cuboid and Cube

MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 23
Water in a canal 30 dm wide and 12 dm deep, is flowing with a velocity of 100 km per hour. If 8 cm of standing water is desired, _____m2 area will it irrigate in 30 minutes.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 24
Half cubic meter of gold-sheet is extended by hammering so as to cover an area of 1 hectare. Find the thickness of the gold-sheet.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 25
How many cubic centimetres of iron are there in an open box whose external dimensions are 36 cm, 25 cm and 16.5 cm, the iron being 1.5 cm thick throughout? If 1 cubic cm of iron weighs 15 g, find the weight of the empty box in kg.
EASY
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 26
A rectangular container, whose base is a square of side 5 cm, stands on a horizontal table, and holds water up to 1 cm from the top. When a cube is placed in the water it is completely submerged, the water rises to the top and 2 cubic cm of water overflows. Calculate the volume of the cube and also the length of its edge.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 27
A rectangular tank is 80 m long and 25 m broad. Water flows into it through a pipe whose cross-section is 25 cm2, at the rate of 16 km per hour. If the level of the water rises by k cm in the tank in 45 minutes, then find the value of k.
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>EXERCISE>Q 28
Water in a rectangular reservoir having base 80 m by 60 m is 6.5 m deep. In what time can the water be emptied by a pipe of which the-cross-section is a square of side 20 cm, if the water runs through the pipe at the rate of 15 km/hr?
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 1
If two cubes each of side 6 cm are joined face to face, then the volume of the resulting cuboid=_____cm3.
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 18 - Surface Area and Volume of a Cuboid and Cube>VERY SHORT ANSWER TYPE QUESTIONS (VSAQs)>Q 2
Three cubes of metal whose edges are in the ratio 3:4:5 are melted down into a single cube whose diagonal is 123cm. Find the edges of three cubes.