Advertisements
Advertisements
प्रश्न
4 typists are employed to complete a work in 12 days. If two more typists are added, they will finish the same work in _________ days
विकल्प
7
8
9
10
Advertisements
उत्तर
8
Explanation;
Hint:
| Typist | Days |
| 4 | 12 |
| 2 more added 4 + 2 = 6 | x |
4 × 12 = 6 × x, `(4 xx 12)/6` = x
x = 8
APPEARS IN
संबंधित प्रश्न
Rehman is making a wheel using spokes. He wants to fix equal spokes in such a way that the angles between any pair of consecutive spokes are equal. Help him by completing the following table:
| Number of spokes | 4 | 6 | 8 | 10 | 12 |
| Angle between a pair of consecutive spokes |
90° | 60° | ... | ... | ... |
- Are the number of spokes and the angles formed between the pairs of consecutive spokes in inverse proportion?
- Calculate the angle between a pair of consecutive spokes on a wheel with 15 spokes.
- How many spokes would be needed if the angle between a pair of consecutive spokes is 40°?
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.
A work-force of 420 men with a contractor can finish a certain piece of work in 9 months. How many extra men must he employ to complete the job in 7 months?
1200 men can finish a stock of food in 35 days. How many more men should join them so that the same stock may last for 25 days?
Five workers take 12 days to weed a field. How many days would 6 workers take? How many would 15 take?
It takes 120 minutes to weed a garden with 6 gardeners. If the same work is to be done in 30 minutes, how many more gardeners are needed?
If x varies inversely as y and when x = 6, y = 8, then for x = 8 the value of y is 10.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Increase in cost and number of shirts that can be purchased if the budget remains the same.
If x varies inversely as y and x = 20 when y = 600, find y when x = 400.
If a deposit of Rs 2,000 earns an interest of Rs 500 in 3 years, how much interest would a deposit of Rs 36,000 earn in 3 years with the same rate of simple interest?
