Advertisements
Advertisements
प्रश्न
If a and b vary inversely to other, then find the values of p, q, r ; x, y, z and l, m, n.
| a | 6 | 8 | q | 25 |
| b | 18 | p | 39 | r |
Advertisements
उत्तर
If a and b vary inversely to other.
i.e. ab = k ...(Constant)
For table,
| a | 6 | 8 | q | 25 |
| b | 18 | p | 39 | r |
If a = 6 and b = 18
Then, a × b = 6 × 18 = 108
⇒ k = 108
When a = 8 and b = p, then
ab = k
⇒ 8 × p = 108
⇒ p = `27/2`
When a = q and b = 39, then
ab = k
∴ q × 39 = 108
⇒ q = `108/39 = 36/13`
When a = 25 and b = r, then
ab = k
⇒ 25 × r = 108
⇒ r = `108/25`
APPEARS IN
संबंधित प्रश्न
Which of the following quantities vary inversely as other?
Journey (x km) undertaken by a car and the petrol (y litres) consumed by it.
If 36 men can do a piece of work in 25 days, in how many days will 15 men do it?
A work force of 50 men with a contractor can finish a piece of work in 5 months. In how many months the same work can be completed by 125 men?
Forty students stay in a hostel. They had food stock for 30 days. If the students are doubled then for how many days the stock will last?
12 cows can graze a field for 10 days. 20 cows can graze the same field for _______ days
If x varies inversely as y, then
| x | – | 60 |
| y | 2 | 10 |
Find the values of x and y if a and b are in inverse proportion:
- 12 x 8
- 30 5 y
At a particular time, the length of the shadow of Qutub Minar whose height is 72 m is 80 m. What will be the height of an electric pole, the length of whose shadow at the same time is 1000 cm?
A packet of sweets was distributed among 10 children and each of them received 4 sweets. If it is distributed among 8 children, how many sweets will each child get?
Two persons could fit new windows in house in 3 days.
How many persons would be needed to fit the windows in one day?
