Maths practice for 11-year-olds. - page 104 of 222

Number of problems found: 4433

Clades - cylinder
What is the weight of twenty spruce clades (cylinder shape), which have a diameter of 30 cm and are 4 m long?
Cylindrical 27733
The cylindrical silo has a diameter of 4 m and a height of 7 m. For how many square meters is it necessary to buy paint to paint against corrosion (we paint the silo only from the outside)?
Filling the pool
How many liters of water must be poured into a pool 25m long, 800cm wide, and 20m deep? The pool should be filled to 3/4 of its depth. How many euros will you pay for pool tiling, and a square meter of tiling costs 20 euros?
Cylinder container
The cylindrical container with a diameter of 1.8 m contains 2,000 liters of water. How high does the water reach?
Dimensions: 27511
Calculate the surface of the paper cylinder (without lid), which has the following dimensions: bottom radius: 7 cm, cylinder height: 22 cm.
Difference of temperatures
The temperature on Saturday was –2°C. The temperature on Sunday was 8°C. Write down the difference between these two temperatures.
The temperature 8
The temperature on Monday was –6°C. On Tuesday, the temperature was 3 degrees lower. Write down the temperature on Tuesday.
An investor
An investor purchased 75 shares of stock at $42.80 per share and, six months later, sold the shares for $47.15 per share. The $20 stockbroker fee will not be charged for this sale. Calculate the total profit or loss of the transaction.
Round 9
Round number 0.2375 TO 2 SIGNIFICANT FIGURES
How many 3
How many hours do the Andersons watch TV in all Wednesday 3/1 hr Thursdays 2/3 hr Friday 4/5 hr Saturday 3/4 hr
Kilometers 27191
The plane dusted the field in 25 minutes at 252 km/h. How many kilometers has it flown?
Grandchildren 27181
Grandma baked buns, which she wanted to divide fairly among her grandchildren. If she gave everyone 5 buns, she would have 2 buns left. If she gave each grandchild 6 buns, she would be missing 3 buns. How many grandchildren does grandma have? How many bun
Equation with decimals
Equation: 2.5 + x = 4.1 + 0.7
Competitor 27141
The competitor runs on a circular track with a radius of 86 m. How many meters will he run three circuits?
Returning 27121
Two gears – one smaller and one larger rotate so that the teeth of both wheels mesh together. The first wheel has 18 teeth, the second 27. How often does each wheel turn before returning to its starting position?
Kilometers 27101
If I drive 30 km in two hours, how many kilometers will I drive in 2.5 hours if I drive at the same speed?
Intervals 27081
Three lines depart from the bus terminal at 5:30 in the morning. At what time will all three buses meet again at the terminus first, if one has intervals of 10 minutes, the second 12 minutes, and the third 15 minutes?
Spherical 27051
How much fabric is needed to sew a spherical hot air balloon with a diameter of 15 m? How much air is needed to inflate the balloon?
Semicircle
Calculate the length of a semicircle with a radius of 6cm.
Eggs
One egg boiled for 10 minutes. How long will it take to boil ten eggs at a time?

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