Advertisements
Advertisements
प्रश्न
In a school there is 7 periods a day each of 45 minutes duration. How long each period is if the school has 9 periods a day assuming the number of hours to be the same?
Advertisements
उत्तर
Number of periods increases as duration decreases, since the number of hours is same.
Let the duration of each period be x.
| Number of periods | 7 | 9 |
| Duration of period (min) | 45 | x |
x1y1 = x2y2
7 × 45 = 9 × x
x = `(7 xx 45)/9`
x = 35
Duration of every period = 35 min
APPEARS IN
संबंधित प्रश्न
A batch of bottles was packed in 25 boxes with 12 bottles in each box. If the same batch is packed using 20 bottles in each box, how many boxes would be filled?
A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?
Which of the following quantities vary inversely as other?
Journey (x km) undertaken by a car and the petrol (y litres) consumed by it.
1200 men can finish a stock of food in 35 days. How many more men should join them so that the same stock may last for 25 days?
A car can finish a certain journey in 10 hours at the speed of 48 km/hr. By how much should its speed be increased so that it may take only 8 hours to cover the same distance?
16 taps can fill a petrol tank in 18 minutes. The time taken for 9 taps to fill the same tank will be _________ minutes
A toy company requires 36 machines to produce car toys in 54 days. How many machines would be required to produce the same number of car toys in 81 days?
If one angle of a triangle is kept fixed then the measure of the remaining two angles vary inversely with each other.
Sobi types 108 words in 6 minutes. How many words would she type in half an hour?
Find the values of x and y if a and b are in inverse proportion:
- 12 x 8
- 30 5 y
