Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Let the required height of the pole be ‘x’ m.
| Height of pole in m | 8 | x |
| Length of shadow in m | 6 | 30 |
Height of the pole and its shadow are in direct proportion
∴ `(x_1)/(y_1) = (x_2)/(y_2)`
`8/6 = x/30`
x = `(8 xx 30)/6`
x = 40
∴ Height of the pole x = 40 m.
APPEARS IN
संबंधित प्रश्न
Following are the car parking charges near a railway station upto
| 4 hours | ₹60 |
| 8 hours | ₹100 |
| 12 hours | ₹140 |
| 24 hours | ₹180 |
Check if the parking charges are in direct proportion to the parking time.
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?
If 12 boys earn Rs 840 in 7 days, what will 15 boys earn in 6 days?
- How far will it travel in 20 minutes?
- Find the time required to cover a distance of 250 km.
A group of 21 students paid ₹ 840 as the entry fee for a magic show. How many students entered the magic show if the total amount paid was ₹ 1680?
Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her average speed should be ______.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Simple interest on a given sum and the rate of interest.
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.
From the following table, determine if x and y are in direct proportion or not.
| x | 3 | 6 | 15 | 20 | 30 |
| y | 12 | 24 | 45 | 60 | 120 |
From the following table, determine if x and y are in direct proportion or not.
| x | 4 | 7 | 10 | 16 |
| y | 24 | 42 | 60 | 96 |
