by aparna
(chennai)
a man bought 66 kgs of 3 types of fruits namely banana, oranges and apple. The ratio of banana to oranges is 4:5 and that of oranges to apples is 2:3 Find out how many kgs of apples were bought
Let x be number of Banana
Let y be number of orange
let z be number of apple
x + y + z = 66
x/y = 4/5
After crossmultiplication, 5x = 4y.
Thus, x = 4y/5
y/z = 2/3
After crossmultiplication, 2z = 3y.
Thus, z = 3y/2
Replace x and z into x + y + z = 66
4y/5 + y + 3y/2 = 66
(8y + 10y + 15y)/10 = 66
33y/10 = 66
33y = 660, so y = 20
There are 20 kg of oranges
Since z = 3y/2, z = (3 * 20)/2 = 60/2 = 30
There are 30 kg of apples
Comments for ratio & proportions








Aug 09, 16 01:40 PM
Average age of Dipu and Apu is 22 years. Average age of Dipu and Tipu is 24 years. Age of Dipu is 21 years. What are the ages of Apu, and tipu ? Let
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