9th mathematics exercise question with answer, Mathematics

Variation – Exercise 3.6.3 – Class IX

If z varies jointly as x an the square root of y, and if z = 6 when x = 3 and y = 16, find z when x = 7 and y = 4. Solution: Zα jointly as x and √y Z = 6; x = 3 and y = 16 Z = k… Continue reading Variation – Exercise 3.6.3 – Class IX

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9th mathematics exercise question with answer, Mathematics

Variation – Exercise 3.6.3 – Class IX

If 7 workers can build a trench in 25 hours, how many workers will be required to be the same work in 35 hours? Solution: workers                  hours 7                                 25 x                                  35 Then, x = 7x25/35  = 5 workers A farmer has a stock of food enough to feed 28 animals for nine days, he buys… Continue reading Variation – Exercise 3.6.3 – Class IX