Question

9. The water level in a tank is 120 metres. When the
outlet pipe connected to the tank is opened for a
short duration of time, the water level drops by 50
metres. After a while, an inlet pipe connected to
the tank is opened and the water level rises by 20
metres. What is the current water level in the tank?​

Answer 1

Step-by-step explanation:

in the tank water level 100

dropped 50 level

and after rise 20

total level of water is 70

then 70 × 120/100=84metres

Answer 2

Answer:

90

Step-by-step explanation:

In the tank water level =120

and the outlet pipe the water level drops =50 m

and after rise 20 m

the difference of 50 and 20 =30

Also,the difference of 120 and 30 =90

therefore,The final height of the water level of tank =90

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