Question

A tank had 80 L of water. 20% of the water was drained out. How many litres of water drained out from the tank ?

Answer 1

Answer:64 liters

To find how much water drained after sometime we will first find(1) 20% of 80. (2)After that we will subtract 80 from the answer we got 20% of 80.

Step-by-step explanation:

(1)

• 20% of 80=$\frac{20}{100}$×80(Next step will be cancelling the zeros)

=$\frac{20}{100}$×80(First we will cancel the zero from 20 and 100)

=$\frac{2}{10}$×80(Next we will cancel the zeros from 80 and 10(100))

=$\frac{2}{1}$×8(now$\frac{2}{1}$ ×8 or 2×8=16)

=16(Now we know that 20% of 80 is 16)

(2)

Next step:Now we will subtract 16 from 80 to find the remaining water left in the tank after it drain 20%

• 80-16=64

∴64liter of water is remaining in the tank and 16liters of water was drained from the tank.

Answer 2

Answer:

Step-by-step explanation:

Answer:64 liters

To find how much water drained after sometime we will first find(1) 20% of 80. (2)After that we will subtract 80 from the answer we got 20% of 80.

Step-by-step explanation:

(1)

20% of 80=×80(Next step will be cancelling the zeros)

=×80(First we will cancel the zero from 20 and 100)

=×80(Next we will cancel the zeros from 80 and 10(100))

=×8(now ×8 or 2×8=16)

=16(Now we know that 20% of 80 is 16)

(2)

Next step:Now we will subtract 16 from 80 to find the remaining water left in the tank after it drain 20%

80-16=64

∴64liter of water is remaining in the tank and 16liters of water was drained from the tank.