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
In which of the following table x and y vary inversely:
| x | 4 | 3 | 12 | 1 |
| y | 6 | 8 | 2 | 24 |
It x and y vary inversely, fill in the following blank:
| x | 12 | 16 | ... | 8 | ... |
| y | ... | 6 | 4 | ... | 0.25 |
If 40 workers can do a project work in 8 days, then _________ workers can do it in 4 days
It takes 60 days for 10 machines to dig a hole. Assuming that all machines work at the same speed, how long will it take 30 machines to dig the same hole?
Neelaveni goes by bicycle to her school every day. Her average speed is 12 km/hr and she reaches school in 20 minutes. What is the increase in speed, If she reaches the school in 15 minutes?
10 farmers can plough a field in 21 days. Find the number of days reduced if 14 farmers ploughed the same field?
In case of inverse proportion, `a_2/- = b_2/-`
If d varies directly as t2, then we can write dt2 = k, where k is some constant.
Sobi types 108 words in 6 minutes. How many words would she type in half an hour?
If a and b vary inversely to other, then find the values of p, q, r ; x, y, z and l, m, n.
| a | 2 | y | 6 | 10 |
| b | x | 12.5 | 15 | z |
