Advertisements
Advertisements
Question
If 600 rupees buy 15 bunches of feed, how many will 1280 rupees buy?
Advertisements
Solution 1
Let us suppose x bunches of feed can be bought for 1280 rupees.
The number of bunches of feed and their cost vary in direct proportion.
∴ `15/600 = "x"/1280`
⇒ x = `(15 xx 1280)/600`
⇒ x = `(15 xx128)/60`
⇒ x = `(1920)/60`
x = 32
Hence, 32 bunches of feed can be bought for 1280 rupees.
Solution 2
We are given that 600 rupees can buy 15 bunches of feed.
First, find the cost of 1 bunch:
⇒ `600/15 = 40` rupees per bunch
Now, calculate how many bunches 1280 rupees can buy:
⇒ `1280/40 = 32`
Thus, 1280 rupees can buy 32 bunches of feed.
RELATED QUESTIONS
Suppose 2 kg of sugar contains 9 × 106 crystals.
How many sugar crystals are there in
- 5 kg of sugar?
- 1.2 kg of sugar?
A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the length of the shadow cast by another pole 10 m 50 cm high.
Complite the following table given that x varies directly as y .
| x | 6 | 8 | 10 | ... | 20 |
| y | 15 | 20 | ... | 40 | ... |
A car is travelling at the average speed of 50 km/hr. How much distance would it travel in 12 minutes?
The amount of extension in an elastic spring varies directly with the weight hung on it. If a weight of 250 gm produces an extension of 3.5 cm, find the extension produced by the weight of 700 gm.
In 10 days, the earth picks up 2.6 × 108 pounds of dust from the atmosphere. How much dust will it pick up in 45 days?
A and B can polish the floors of a building in 10 days. A alone can do \[\frac{1}{4}\] th of it in 12 days. In how many days can B alone polish the floor ?
The shadow of a pole with height of 8 m is 6 m. If the shadow of another pole measured at the same time is 30 m, find the height of the pole?
The mass of an aluminum rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.
A water tank casts a shadow 21 m long. A tree of height 9.5 m casts a shadow 8 m long at the same time. The lengths of the shadows are directly proportional to their heights. Find the height of the tank.

