Question

A4. 5 pipes can fill a tank in 1 hour 38 minutes. How long will it take for 7 such pipes to fill the
tank?
A5. For a given area, prove that the length of a rectangle is inversely proportional to its width
A6. 18 men can complete a task in 12 days. How many more men should be employed to complete the same task in 9 days
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Answer 1

Answer:

1 hour and 10 minutes

Step-by-step explanation:

5*1h,38m=7*x

98*5=7*x

=>(98*5)/7=x

=>x=70

70min= 1 hour and 10 minutes

Used inverse variation

Answer 2

hey mate here is your answer :

A4 )

5 pipes fill a tank = 1hr 38 minutes

7 pipes fill a tank = ?

now convert the hours into minutes

1 hrs = 60 minutes + 38 minutes

98 minutes

5×98=7×x

490 = 7x

490 = x

490 / 7 = x

70 = x

1 hr 10 minutes

A6 )

18 men can complete a task =12

__ men can complete a task =9

18 = 12

9 = ?

18×12 = 9×x

216 = 9x

216 / 9 = x

24 men can complete a task in 9 days