Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc8cf59b460d7261ed99.PNG' />
Look at the above figure. If x varies inversely as y, then what replaces the blank ?
Question 2 :
Under the condition that the temperature remains constant, the volume of gas is inversely proportional to its pressure. If the volume of gas is 630 cubic centimetres at a pressure of 360 mm of mercury, then what will be the pressure of the gas if its volume is 720 cubic centimetres at the same temperature?
Question 3 :
30 persons can reap a field in 17 days. How many more persons should be engaged to reap the same field in 10 days?
Question 4 :
A car covers a distance in 40 minutes with an average speed of 60 km/h. What should be the average speed to cover the same distance in 25 minutes?
Question 5 :
Ravi starts for his school at 8:20 a.m. on his bicycle. If he travels at a speed of 10 km/h, then he reaches his school late by 8 minutes but on travelling at 16 km/h he reaches the school 10 minutes early. At what time does the school start?
Question 6 :
If Naresh walks 250 steps to cover a distance of 200 metres, find the distance travelled in 350 steps.
Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc93f59b460d7261eda2.PNG' />
In the above figure, a table is shown. If a and b vary inversely to each other, then find the value of x.
Question 8 :
If x varies inversely as y and x = 20 when y = 600, find y when x = 400.
Question 9 :
44 cows can graze a field in 9 days. How many less/more cows will graze the same field in 12 days?
Question 10 :
Devangi travels 50 m distance in 75 steps, then the distance travelled in 375 steps is _______ km.
Question 11 :
l varies directly as m and l is equal to 5, when m = $\frac {2}{3}$ . Find l when m = $\frac {16}{3}$.
Question 12 :
Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her average speed should be
Question 13 :
The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?
Question 14 :
A car travels a distance of 225 km in 25 litres of petrol. How many litres of petrol will be required to cover a distance of 540 kilometres by this car?
Question 15 :
In a hostel of 50 girls, there are food provisions for 40 days. If 30 more girls join the hostel, how long will these provisions last?
Question 16 :
Choose the correct option. The number of people working and the quantity of work
Question 17 :
If x = 5y, then x and y vary ______ with each other.
Question 18 :
If x varies inversely as y and x = 4 when y = 6, then when x = 3 the value of y is _______.
Question 19 :
100 persons had food provision for 24 days. If 20 persons left the place, the provision will last for
Question 20 :
There are 20 grams of protein in 75 grams of sauted fish. How many grams of protein is in 225 gm of that fish?