Advertisements
Advertisements
Question
44 cows can graze a field in 9 days. How many less/more cows will graze the same field in 12 days?
Advertisements
Solution
44 cows can graze a field = 9 days
The number of cows that can graze the same field in 1 day = 44 × 9 cows
In 12 days, the number of cows required = `(44 xx 9)/12`
= `(44 xx 3)/4`
= 11 × 3
= 33 cows
Hence, (44 – 33) i.e. 11 cows less required for graze the same field in 12 days.
APPEARS IN
RELATED QUESTIONS
Explain the concept of direct variation.
A and B can do a piece of work in 18 days; B and C in 24 days and A and C in 36 days. In what time can they do it, all working together?
A cistern has two inlets A and B which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely?
A cistern can be filled by a tap in 4 hours and emptied by an outlet pipe in 6 hours. How long will it take to fill the cistern if both the tap and the pipe are opened together?
The cost of 12 quintals of soyabean is 36,000 rupees. How much will 8 quintals cost?
A car is travelling 48 km in one hour. The distance travelled by the car in 12 minutes is ______.
It is given that l varies directly as m. Find l, when m is 33.
From the following table, determine if x and y are in direct proportion or not.
| x | 3 | 6 | 15 | 20 | 30 |
| y | 12 | 24 | 45 | 60 | 120 |
Campus and Welfare Committee of school is planning to develop a blue shade for painting the entire school building. For this purpose various shades are tried by mixing containers of blue paint and white paint. In the following mixtures, decide which is a lighter shade of blue and also find the lightest blue shade among all of them.
| Mixture G | Mixture H |
 |
 |
If one container has one litre paint and the building requires 105 litres for painting, how many container of each type is required to paint the building by darkest blue shade?
Many schools have a recommended students-teacher ratio as 35:1. Next year, school expects an increase in enrolment by 280 students. How many new teachers will they have to appoint to maintain the students-teacher ratio?
