Length - practice for 13 year olds - page 34 of 63
Number of problems found: 1254
- Magnification 7927
The photo has 6cm and 9cm dimensions and should be enlarged 8: 3. What will be the dimensions after magnification? - Dimensions 7915
The cuboid’s dimensions are in the ratio of 16:12:8, and the sum of these dimensions is 180 dm. What are the dimensions of the cuboid? - Average height
The average height of all pupils is 162 cm. The class teacher's height is 178 cm. The average height of all (teacher and all pupils) is 163 cm. Calculate the number of pupils in the class. - Two-fifths 7878
The cyclist drives a 240 km long route in 3 days. On the first day, go half of the entire route. The second day passed two-fifths of the rest of the way. What percentage of the cyclist completed the whole way on the third day?
- Wave parameters
Calculate the speed of a wave if the frequency is 336 Hz and the wavelength is 10 m. - Diagonals at right angle
In the trapezoid ABCD, this is given: AB=12cm CD=4cm And diagonals crossed under a right angle. What is the area of this trapezoid ABCD? - Hrebienok 7856
A tourist would cover the route from Skalnate Pleso to Hrebienok at a constant speed in 2 hours. His friend would walk the same route from Hrebienk to Skalnaté Pleso in 3 hours. When will they meet if they both go hiking at 9:00? - Shadow 7838
A man 1.65 m tall casts a shadow of 1.25 m. How tall is the tree whose shadow is in debt 2.58 m? - Determine 7836
We want to cut a 90 cm long rod into two parts so that the longer part of the rod is 2 cm shorter than three times the shorter part. Determine the lengths of both parts of the rod.
- Circumference 7823
The bases are 9 cm and 5 cm long in a rectangular trapezoid. The length of the shorter arm is 3 cm. Calculate its circumference and area. - Diameter of a cylinder
The diameter of the cylinder is 42 cm. How many times does the cylinder turn on a 66m long track? - Grandmother
Mom walked out to visit her grandmother in a neighboring village 5km away and moved at a speed of 4km/h. An hour later, father drove down the same road at an average speed of 64km/h. 1) How long will it take to catch Mom? 2) What is the approximate distan - Two gears
The two gears fit together. The larger gear has 32 teeth. The smaller gear has 20 teeth fewer. How many times does turn a smaller gear if the bigger gear turns three times? - Direction 7728
Two swimmers trained together in a small pool. Swimmer Pike will swim the pool in 16 seconds, swimmer Kaprik in 20 seconds. Both swimmers suddenly jumped into the pool from the same edge and, for 160 seconds, swam along the length of the pool back and for
- Perpendicular 7712
Calculate the length of the shadow of a ladder 8 m long leaning against a 6 m high wall. (the sun shines perpendicular to the ladder - see picture). - Quadrangular pyramid
The regular quadrangular pyramid has a base length of 6 cm and a side edge length of 9 centimeters. Calculate its volume and surface area. - Distance 7692
On a map with a scale of 1:48 000, the distance between cities is 40mm. What is the actual length of cities in km? - Constant 7689
From cities A and B, two cars drive opposite each other on the same road. The first runs at a constant speed of 80 km/h, and the second at 60 km/h. How far will these cars be a quarter of an hour before the match? - Minutes 7660
The mile came from point A at 13 hours at a speed of 4 km/h. At 3.30 PM, Líba rode her at a speed of 20 km/h. How many minutes will Líba catch up with Milo?
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