Advertisements
Advertisements
Question
A dozen bananas costs ₹ 20. What is the price of 48 bananas?
Solution
Let the required price be ₹ x.
As the number of bananas increases price also increases
∴ Number of bananas and cost are in direct proportion.
| Number of bananas | 1 dozen = 12 | 48 |
| Cost in rupees | 20 | x |
`(x_1)/(y_1) = (x_2)/(y_2)`
`12/20 = 48/x`
x = `(48 xx 20)/12`
x = 80
∴ Price of 48 bananas = ₹ 80.
APPEARS IN
RELATED QUESTIONS
In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?
Ten men take 4 days to complete the task of tarring a road. How many days would 8 men take?
Assuming land to be uniformly fertile, the area of land and the yield on it vary ______
Both x and y are in direct proportion, then `1/x` and `1/y` are ______
In direct proportion, `a_1/b_1` ______ `a_2/b_2`
Two quantities x and y are said to vary directly with each other if for some rational number k, xy = k.
The area of cultivated land and the crop harvested is a case of direct proportion.
Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed?
Ms. Anita has to drive from Jhareda to Ganwari. She measures a distance of 3.5 cm between these villages on the map. What is the actual distance between the villages if the map scale is 1 cm = 10 km?
Here is a key board of a harmonium:
- Find the ratio of white keys to black keys on the keyboard.
- What is the ratio of black keys to all keys on the given keyboard.
- This pattern of keys is repeated on larger keyboard. How many black keys would you expect to find on a keyboard with 14 such patterns.
