Units - math word problems
Number of problems found: 3477
- Three workshops
One workshop can complete the task in 48 days, the second in 30 days and the third in 20 days. In how many days would the task be completed if all workshops worked?
Alice spent 5/11 of her money on a back pack. She has $42 dollars left. How much was her back pack?
From wooden block carpenter cut off a small cuboid block with half the edge length. How many percent of wood he cut off?
- Hexagon A
Calculate area of regular hexagon inscribed in circle with radius r=9 cm.
- Angles of a hexagon
Find the interior angles of a hexagon if the sizes of the angles form an arithmetic sequence and the smallest angle is 70°.
- Four sides of trapezoid
Trapezoid is given by length of four sides: 40.5 42.5 52.8 35.0. Calculate its area.
- Half life
Determine the half life of bismuth, when bismuth weight from the original weight of 32 g was only 2 grams in 242 minutes.
- Big cube
Calculate the surface of the cube, which is composed of 64 small cubes with an edge 1 cm long.
What is the inside diameter of the cylinder container and if half a liter of water reaches a height 15 cm?
A camera has a listed price of $751.98 before tax. If the sales tax rate is 9.25%, find the total cost of the camera with sales tax included.
- Savings and retirement
The older sibling has saved 44% more euros than the youngest, which represents 22 euros. How many euros older brother has saved ?
Smiths paid a deposit for a vacation of two-sevenths of the total price of the vacation. Then paid also € 550. How much cost their vacation?
How high is the building that throws horizontal shadow 95.4 m long at angle 50°?
- Birthday paradox
How large must the group of people be so that the probability that two people have a birthday on the same day of the year is greater than 90%?
What is the smallest length of flowerbeds we have to prepare to plant seedlings at grid 20,30,25,40 cm?
Weightlifter lifted 75% of its weight. Determine how much weight lifted when he weighs 132 kg.
Calculate length of the biggest fishing rod can be inserted into the trunk of a car with dimensions 165 x 99 × 85 cm?
- Father and sons
Father is 27 and his sons 2 and one year. In how many years will his sons sum up to half his age?
- The length
The length of a rectangle is 6 meters less than twice the width. If the area of the rectangle is 216 meters, find the dimensions of the rectangle.
- Acute angles
Sizes of acute angles in the right-angled triangle are in the ratio 1: 3. What is size of the larger of them?