7 Variation

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1. x varies directly as y, when x = 5, y = 30. Find the constant of variation and equation of variation. 1) y = 6x 2) y = 3x 3) y = 2x 4) y = 16x

2. Cost of groundnuts is directly proportional to its weight. If cost of 5 kg groundnuts is ` 450 then find the cost of 1 quintal groundnuts 1) Rs.3500 2) Rs. 450 3) Rs.9000 4) Rs. 2000

3. 15 women finish the work of harvesting a groundnut crop in 8 days. Find the number of women if the same job is to be completed in 6 days. 1) 40 2) 10 3) 120 4) 20

4. a vehical running at a speed of 48 km/hr takes 6 hours to complete the journey. How much time will be taken to complete the journey if its speed is 72 km/hr ? 1) 8 hours 2) 2 hours 3) 6 hours 4) 4 hours

5. 120 bags of half litre milk can be filled by a machine within 3 minutes find the time to fill such 1800 bags ? 1) 20 minutes 2) 45 minutes 3) 25 minutes 4) 40 minutes

6. The cost of 5 metres of a particular quality of cloth is Rs 210. calculate the cost of 2 metre cloth. 1) 84 2) 217 3) 105 4) 215

7. A train is moving at a uniform speed of 75 km/hour.How far will it travel in 20 minutes? 1) 15 Km 2) 25 Km 3) 35 Km 4) 20 Km

8. 6 pipes are required to fill a tank in 1 hour 20 minutes. How long will it take if only 5 pipes of the same type are used? 1) 1 hour 36 minutes 2) 90 minutes 3) 2 hour 36 minutes 4) 90 minutes

9. If 15 workers can build a wall in 48 hours, how many workers will be required to do the same work in 30 hours? 1) 20 workers 2) 24 workers 3) 12 workers 4) 14 workers

10. There are 100 students in a hostel. Food provision for them is for 20 days. How long will these provisions last, if 25 more students join the group? 1) 40 2) 16 3) 10 4) 18