Advertisements
Advertisements
Question
6 men can complete the electric fitting in a building in 7 days. How many days will it take if 21 men do the job?
Advertisements
Solution
\[\text{ It is given that 6 men can complete a job in 7 days } . \]
\[ \therefore \text{ Time taken by 1 man to complete the same job } = \left( 6 \times 7 \right) = 42 \text{ days } \]
\[ \therefore \text{ Time taken by 21 men to complete the same job } = \frac{42}{21} = 2 \text { days } \]
RELATED QUESTIONS
Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?
Fill in the blank in of the following so as to make the statement true:
x and y are said to vary directly with each other if for some positive number k ....,...... = k.
A, B and C can reap a field in \[15\frac{3}{4}\] days; B, C and D in 14 days; C, D and A in 18 days; D, A and B in 21 days. In what time can A, B, C and D together reap it?
- How far will it travel in 20 minutes?
- Find the time required to cover a distance of 250 km.
If 7 m cloth costs ₹ 294, then the cost of 5 m of cloth is ________
A group of 21 students paid ₹ 840 as the entry fee for a magic show. How many students entered the magic show if the total amount paid was ₹ 1680?
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Distance travelled by an auto-rickshaw and time taken.
It is given that l varies directly as m. Find l, when m is 33.
The mass of an aluminum rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.
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 |
