# Expression of a variable from the formula - 6th grade (11y) - math problems

#### Number of problems found: 104

• An equilateral triangle The perimeter of an equilateral triangle is 33cm. How long is each side? Calculate the radius of the circle whose length is 107 cm larger than its diameter
• Steel tube The steel tube has an inner diameter of 4 cm and an outer diameter of 4.8 cm. The density of the steel is 7800 kg/m3. Calculate its length if it weighs 15 kg.
• The perimeter 3 The perimeter of a rectangle is 35 cm. The ratio of the length to its width is 3:2. Calculate the dimensions of the rectangle
• Number of songs Write an expression for the number of songs they need for this show. Evan and Peter have a radio show that has 2 parts. They need 4 fewer than 11 songs in the first part. In the second part, they need 5 fewer than 3 times the number of songs in the first
• Water tank What is the height of the cuboid-shaped tank with the bottom dimensions of 80 cm and 50 cm if the 480 liters of water reaches 10 cm below the top?
• Sum of four numbers The sum of four consecutive natural numbers is 114. Find them.
• A cylindrical tank A cylindrical tank can hold 44 cubic meters of water. If the radius of the tank is 3.5 meters, how high is the tank?
• Rectangle 45 The perimeter of a rectangle is 60cm. If the length of the rectangle is 20cm. a)find the width b)find the area.
• Two thirds Find two-thirds of the number equal to two-thirds of 99
• Edges or sides Calculate the cube volume, if the sum of the lengths of all sides is 276 cm.
• Isosceles triangle The circumference of the isosceles triangle is 32.5 dm. Base length is 153 cm. How long is the leg of this triangle?
• Expression Solve for a specified variable: P=a+4b+3c, for a
• Cube edges The sum of the lengths of the cube edges is 42 cm. Calculate the surface of the cube.
• Clothes Danka and Janka collect clothes. Danka had 9 more than Janka, so she gave her 7. Which now has more cloth and how many?
• A rectangle A rectangle has an area of 36 cm2. What could the length and width of rectangle be?
• The tourist The tourist came started from the hostel at an average speed of 5km/h. Half an hour later, the bicyclist started along the same route at a speed of 20km/h. How many minutes will a cyclist catch up and how many kilometers will he go?
• Three pumps The water tank is emptied with the first pump in 6 hours, with the second pump in 2 hours. In order to be emptied in 1 hour, all three pumps had to be started at once. How long will take tank be emptied by only the third pump?
• Simple sequence Continue with this series of numbers: 1792,448, 112, _, _
• Twenty Twenty rabbits are put in 4 cells so that there are different number of rabbits in each cell contains at least 3 rabbits. What is the largest possible number of rabbits in one cell

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