Ratio - practice for 12 year olds - page 17 of 29
Number of problems found: 572
- Cuboid
The sum of the lengths of the three edges of the cuboid that originate from one vertex is 210 cm. The edge length ratio is 7: 5: 3. Calculate the length of the edges. - Minutes 6071
What is the angle of the big hand of the watch in 20 minutes? - Consumption 6068
In two months, the Novák family consumed 624 kWh of electricity during the day and 3018 kWh at night. How much kWh of electricity will the Novák family consume now in two months at the daily rate, and how much at the night rate if they decide to reduce co - Traveling 6067
A car traveling at 75 km/h will drive from place A to place B in 3/4 hours. How long does it take for a cyclist to get there at a speed of 25 km/h?
- Line segment
The 4 cm long line segment is enlarged in the ratio of 5/2. How many centimeters will measure the new line segment? - Electric energy
There are 875 identical light bulbs in the sports hall lighting for 2 hours. How long does the same amount of electricity consume 100 such bulbs? - Seedlings 6051
A forest nursery needs an area of 1.25 square meters per pine seedling. How many pine seedlings are planted in an area of 9 acres? - Capacity 5999
The tank is filled in 1 hour and 12 minutes with a pump with a capacity of 25 l/s. How long does filling the tank with a 20 l / s pump take? - Dependence 5997
Sound travels in the air at a speed of 330 m/s. Build a table of the dependence of the distance that the sound travels in a given time (for 1 to 10s, one second at a time). Write the equation of the relevant dependence.
- Received 5995
Jeníček, Karel, and Martin shared the money from the brigade in a ratio of 2:4:3. Karel received the most, namely 12.60 euros. How much did Jeníček and Martin get together? - Five pumps
The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with five same pumps? - Olda wanted
Oldrich wanted to enlarge the 9 cm x 13 cm photo so that the shorter side measured 18 cm. How big will the longer side of the photo be? - Twelve
Twelve students work on a week forestry brigade. One hundred spruces will receive x CZK, one hundred pine y CZK. How many receive each student in one day if they planted a total of 25,000 spruces per week and 30,000 pine trees? Express by expression. - Babysitting
The amount Susan charges per hour for babysitting is directly proportional to the number of children she watches. She charges $4.50 for three kids. How much would she charge for babysitting five kids?
- Equation 5900
Adam, Cyril, and Boris have a total of 102 CZK. How many crowns does Adam have, how many Boris and how many Cyril, if all three have the same when: a) Adam gives three crowns to Cyril b) Boris will give half of his money to Cyril c) Adam will give a third - Convert 5889
Convert the ratio to the basic form: 3.5:70 - Change 5882
Change the number 132 in the ratio of 7:3. - Divide 5881
Divide the number 600 by the ratio of 9:10:11 - Anywhere 5880
The bus runs 6 km in 9 minutes. How many minutes will the bus go to a place 42 km away if it doesn't stop along the way?
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