Examples for 8th grade
Number of problems found: 3576
- Pipe thickness
The outer circumference of the tube is 32cm. Its length is 60cm, density 8.5g/cm ^ 3 and weight 9.495kg. Calculate the wall thickness of the pipe.
- Iso triangle
An isosceles triangle with a base of 8 cm. Its circumference is 28 cm. Calculate the height of the triangle.
Dana loves rocks! She has 6 pieces of granite, 3 pieces of marble, 14 pieces of sandstone, and 1 piece of slate. What is the ratio of pieces of sandstone to pieces of marble in Dana's collection?
The employer increased the salaries of its three employees by an average of 30 euros. One increased his salary by € 20, the other by € 45. How many euros did he raise the salary of a third employee?
- Create 2
Create word problems based on the given number sentence (300/24) - (207.60/24) = N
- A turtle 2
A turtle can walk 1/12 of a kilometer in an hour. The turtle is 1/5 of a kilometer away from a pond. At this speed, how long will it take the turtle to reach the pond?
- Two companies
The two companies made a work together in 100 days. The first company would do it in 150 days, how many days would the work take the second company?
- Find the
Find the volume and surface of a prism with a height of 120 mm, the base of which is an right isosceles triangle with a leg length of 5 cm.
- Sphere volume formula
If V=4/3 π r3, find, the value of V when r = 7, the value of r when V=113 1/7
How many kg of tin is in 3.6 kg of bronze if it contains 15% tin?
Manganese bronze contains the following amounts of metals per pound: copper 0.89 lb, tin 0.10 lb, and manganese 0.01 lb. How much copper is in a shaft that weighs 235 pounds?
- Chemical drum
A cylinder chemical drum is 220.5cm long and the radius of the drum is 42cm. Calculate the cost of painting the drum at the rate of RS.0.15/cm².
- Face combinations
If I have 20 sets of eyes, 20 noses, and 20 mouths, how many unique face combinations can I make?
- The diagonals
The diagonals in the diamond ABCD are 6 cm and 8 cm long. What is the perimeter of this diamond?
- Multiple ratio
The numbers of boy students, girl students, teachers and other staff of the school are in the ratio 14: 12: 2: 1. How many teachers are there at school if there are 216 girl students at school?
The number of germinated plants increased by 50% to 300 from morning to evening. How many plants were germinated in the morning?
- After the discount
The dishwasher costs 210 EUR after the discount. How much did it cost before the discount if the new price is 90% of the original price?
- Two brothers
The two brothers have a total of 48 nuts. Two thirds of the nuts of the first correspond to 2/5 of the number of nuts of the second. How many nuts does everyone have?
The car runs on a horizontal track at a constant speed of 20 m2-1. It is raining. Raindrops fall in a vertical direction at a speed of 6 m/s. a) How fast is the speed of the drops relative to the car windows? b) What is the angle of the raindro
- Saving account
After a year, bank added 54 euros to Mr Eva saving account. The interest rate on her saving account is 1.25% p. a. How many euros did Mrs. Eva have on her account a year ago?