Grade - math word problems - page 940 of 953

Number of problems found: 19049

Cube
The sum of lengths of cube edges is 56 cm. What are its surface and volume?
Numeric question
Is it possible a negative, irrational number?
Aircraft
Flight length 2886 km took 4 hours. The airport passengers had to arrive hours in advance, 2 hours. Departure was delayed for 2.3 hours. The destination airport formalities took 0.5 hours. Calculate the average speed of passenger travel from arrival to le
Number
Is number 2.8814789 irrational?
Transforming cuboid
A cuboid with dimensions 6 cm, 10, and 11 cm is converted into a cube with the same volume. What is its edge length?
Ratio v2
Decrease in the ratio 8:16 number 20.2.
Ratio
Increase the number 25.6 in the ratio 7:4.
Pipes
The water pipe has a cross-section 1903 cm². An hour has passed 859 m³ of water. How much water flows through the pipe with cross-section 300 cm² per 11 hours if water flows at the same speed?
Chord
In a circle with a radius r=60 cm is the chord, 4× longer than its distance from the center. What is the length of the chord?
Trigonometry
Is true equality? sin(x +13 π)= sin(x)
Trunk
Calculate the length of the biggest fishing rod that can be inserted into the trunk of a car with dimensions 152 x 82 × 81 cm.
Box
Calculate the angle between box base 5 x 10 and body diagonal length 13.
Observatory
The observatory dome has the shape of a hemisphere with a diameter d = 10 m. Calculate the surface.
Rotating cone II
Calculate the area of the surface of a rotating cone with base radius r=20 cm and height h=10 cm.
Rotating cone
Calculate the volume of a rotating cone with base radius r=18 cm and height h=20 cm.
Gold wire
From one gram of gold was pulled wire 1.4 km length. What is its diameter if the density of Au is ρ=19.5 g/cm³?
Is right?
Is a triangle with sides 15, 66, and 68 right triangle?
Education for free
Slovakia circulates a lot of myths, particularly ideas about what must be free. For example - education should be free - children of poor parents should know at least to read and write. Calculate how much a student would have to pay per hour of teaching w
Proof I
When added to the product of two consecutive integers larger one, we get the square larger one. Is this true or not?
Energy saving
They released three different independent inventions saving 15%, 17%, and 16% energy. Some considered that with the use of these inventions, the total savings would be 15% + 17% + 16% = 48%. Is this true? How much will the percent of energy save all three

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