Length - practice for 11 year olds
Number of problems found: 724
- A gardener
A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the cost of the rope, if it costs $0.40 per meter. - The model
The model of a building is constructed with the scale factor 1:30. If height of the model is 80 cm, find the actual height of the building in meters. - A bike 2
A bike is running 72 km/hr. How much distance will it cover in 15 seconds? - A capsule
A medicine capsule is a cylinder with two hemispheres stuck to each end. Its length is 14 mm, and its diameter is 5 mm. Find its surface area.
- Train same direction
Find the time taken by a train 170 m long, running at the speed of 83 km/h, to cross another train 180 m running at the speed of 65 km/h in the same direction. - NYC block
Bijan wants to go running during his family's vacation to New York City. To do so, he will run a neighborhood block 20 times. Bijan runs a total of 8 miles. The block has a length of 3/20 miles. Use the formula for the perimeter of the neighborhood block - The rectangle 7
The rectangle shown has a length (l) of 8 and a width (w) of 6.2. A second rectangle has a length of l + 2.5 and a width of w - 1.4. Find the area of the SECOND rectangle. - Trim the bushes
Mason is always helping him to trim the bushes. The area A had a length of 14 m and a breadth of 7 m, and if we are going to combine A and B, the equal is 215 m². The question is: what is the area of B? - A surveyor
A surveyor estimated the distance across a river to be 300 m. The actual distance across the river was 286.4 m. Find the absolute error and the percent error of the surveyor's estimate. If necessary, round to the nearest tenth.
- Gallons of gas
Sara drives 171 miles on 7.6 gallons of gas. She uses this information to calculate how many miles per gallon she can drive. Using this result, how many miles can Sara drive on 12.5 gallons of gas? - A fence
A fence is to be put around a paddy field. The four sides of the field are 135.37 meters,96.5 meters, 137.46 meters, and 148 meters. Find the total length of fencing. - A metre A metre of lace trim costs $2.90. If Erik buys 3.2 meters of trim, how much will he have to pay?
- A marathon 2
Dean ran marathons on 50 consecutive days. How far did Dean run altogether if a marathon is 26 1/5 miles? - A pilot
A pilot flew 3 450 miles one way to a point of destination. How many miles did it take him to fly to and from the destination?
- Janet
Janet walks 7/10 miles in 1/4 hour. Ian walks 9/10 miles in 1/3 hour; who walks at the faster rate and why? - Tony skates
Tony skates 2 3/4 miles on his ramp every day. Today, he skated 2/5 of his normal skate. How many miles did he skate today? - An electrician 5
An electrician has 4.1 meters of wire. How many strips 7/10 m long can he cut? - The rectangle 6
The rectangle shown has a length (l) of 8 and a width (w) of 6.2. A second rectangle has a length of l + 2.5 and a width of w - 1.4. Find the area of the SECOND rectangle. (The area is in square units.) - The length 18 The length of a rectangle is three times its width. Suppose the perimeter is 96 cm. Calculate the width of the rectangle.
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