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
A loaded truck travels 14 km in 25 minutes. If the speed remains the same, how far can it travel in 5 hours?
Anil can do a piece of work in 5 days and Ankur in 4 days. How long will they take to do the same work, if they work together?
A and B can do a piece of work in 20 days and B in 15 days. They work together for 2 days and then A goes away. In how many days will B finish the remaining work?
Working 8 hours a day, Ashu can copy a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?
Two taps A and B can fill an overhead tank in 10 hours and 15 hours respectively. Both the taps are opened for 4 hours and they B is turned off. How much time will A take to fill the remaining tank?
When the distance is kept fixed, speed and time vary directly with each other.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
The distance travelled by CNG bus and the amount of CNG used.
The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?
It is given that l varies directly as m. Write an equation which relates l and m.
Pattern B consists of four tiles like pattern A. Write a proportion involving red dots and blue dots in pattern A and B. Are they in direct proportion? If yes, write the constant of proportion.
