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.
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 factory required 42 machines to produce a given number of articles in 63 days. How many machines would be required to produce the same number of articles in 54 days?
Find the constant of variation from the table given below:
| x | 3 | 5 | 7 | 9 |
| y | 12 | 20 | 28 | 36 |
Set up a table and solve the following problems. Use unitary method to verify the answer.
Three persons can build a small house in 8 days. To build the same house in 6 days, how many persons are required?
If 40 workers can do a project work in 8 days, then _________ workers can do it in 4 days
A printer, prints a book of 300 pages at the rate of 30 pages per minute. Then, how long will it take to print the same book if the speed of the printer is 25 pages per minute?
In case of inverse proportion, `a_2/- = b_2/-`
If p and q are in inverse variation then (p + 2) and (q – 2) are also in inverse proportion.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
The height of a tree and the number of years.
If x varies inversely as y and x = 20 when y = 600, find y when x = 400.
Two persons could fit new windows in house in 3 days.
How many persons would be needed to fit the windows in one day?
