1) Nine milk bottles contain 4.5 litres of milk between them.How much do five bottles hold?
2) A shopkeeper can buy 36 toys for $20.52. What will he pay for 120 toys?
3) Three men can build a wall in 10 hours. How many men would be needed to build the wall in 7.5 hours?
4) Find the cost of 20 grams of lead at $60 per kg.
5) The height of an office building is 623 feet. Express this height to the nearest metre using 1 m = 3.281 feet
Need Help Urgent!
1. 9/4.5 = 5/L. Solve for L.
2. 36/20.52 = 120/C.
3. Same procedure as #1and #2.
4. 20 Grams = 0.02 kg.
C = 0.020kg * 60/kg =
5. ht. = 623Ft. * 1m/3.281Ft
Can someone help
1) To find out how much five bottles hold, you can set up a proportion using the information given. Since nine bottles contain 4.5 litres, you can set up the ratio 9 bottles : 4.5 litres.
To find the amount five bottles hold, you can set up a proportion using the information given. Since nine bottles contain 4.5 litres, you can set up the ratio:
9 bottles / 4.5 litres = 5 bottles / x litres
Solving for x, the amount five bottles hold:
x = (5 bottles * 4.5 litres) / 9 bottles
x = 2.5 litres
Therefore, five bottles hold 2.5 litres of milk.
2) To find out how much the shopkeeper will pay for 120 toys, you can set up a proportion using the information given. Since the shopkeeper can buy 36 toys for $20.52, you can set up the ratio 36 toys : $20.52.
To find the cost of 120 toys, you can set up a proportion using the information given. Since the shopkeeper can buy 36 toys for $20.52, you can set up the ratio:
36 toys / $20.52 = 120 toys / x dollars
Solving for x, the cost of 120 toys:
x = (120 toys * $20.52) / 36 toys
x = $68.40
Therefore, the shopkeeper will pay $68.40 for 120 toys.
3) To determine how many men would be needed to build the wall in 7.5 hours, you can set up a proportion using the information given. Since three men can build the wall in 10 hours, you can set up the ratio 3 men : 10 hours.
To find the number of men needed to build the wall in 7.5 hours, you can set up a proportion using the information given. Since three men can build the wall in 10 hours, you can set up the ratio:
3 men / 10 hours = x men / 7.5 hours
Solving for x, the number of men needed:
x = (7.5 hours * 3 men) / 10 hours
x = 2.25 men
Since it is not possible to have a fraction of a person, you would need to round up to the nearest whole number. Therefore, you would need 3 men to build the wall in 7.5 hours.
4) To find the cost of 20 grams of lead at $60 per kg, you need to convert the units so that they match.
There are 1000 grams in 1 kilogram, so you can convert 20 grams to kilograms by dividing by 1000:
20 grams / 1000 = 0.02 kilograms
Now that you have the weight in kilograms, you can find the cost by multiplying it by the price per kilogram:
0.02 kilograms * $60/kg = $1.20
Therefore, the cost of 20 grams of lead at $60 per kg is $1.20.
5) To express the height of an office building in meters using the conversion factor 1 m = 3.281 ft, you can divide the height in feet by 3.281 to convert it to meters.
Height in meters = Height in feet / 3.281
Height in meters = 623 ft / 3.281
Height in meters ≈ 189.71 meters (rounded to the nearest meter)
Therefore, the height of the office building is approximately 190 meters.