Question

if 4/5 of a tank is filled in 1 minute how much time will be required to fill empty tank​

Answer 1

Answer:

1 minute 15 seconds

Step-by-step explanation:

Time taken to fill 4/5 of tank = 1 minute

Time taken to fill an empty tank = $x$

From above

= 1

$x = \frac{5}{4}$

x = 1.25 minutes

x = 1 minute + 0.25 minutes

x = 1 minute + 0.25×60 seconds

x = 1 minute 15 seconds