Advertisements
Advertisements
प्रश्न
If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is ______ hours.
Advertisements
उत्तर
If 12 pumps can empty a reservoir in 20 hours, then time required by 45 such pumps to empty the same reservoir is 5h 20 min hours.
Explanation:
∵ 12 pumps can empty a reservoir in 20 h.
∴ 1 pump can empty in 20 × 12 i.e. 240 h.
Then, 45 pumps can empty the same reservoir in
`240/45 h = (240 xx 60)/45 min` ...[∵ 1 h = 60 min]
= `14400/45`
= 320 min
= 5 × 60 + 20
= 5h 20 min
APPEARS IN
संबंधित प्रश्न
A farmer has enough food to feed 20 animals in his cattle for 6 days. How long would the food last if there were 10 more animals in his cattle?
In which of the following table x and y vary inversely:
| x | 4 | 3 | 6 | 1 |
| y | 9 | 12 | 8 | 36 |
If 36 men can do a piece of work in 25 days, in how many days will 15 men do it?
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?
Raghu has enough money to buy 75 machines worth Rs 200 each. How many machines can he buy if he gets a discount of Rs 50 on each machine?
If x and y vary inversely as other and x = 5 when y = 15, find x when y = 12 .
If 40 workers can do a project work in 8 days, then _________ workers can do it in 4 days
If x varies inversely as y, then
| x | – | 60 |
| y | 2 | 10 |
If two quantities p and q vary inversely with each other then ______ of their corresponding values remains constant.
If p and q are in inverse variation then (p + 2) and (q – 2) are also in inverse proportion.
