A rectangular tank 12cm by 20cm by 30cm is filled with water from a tap at a rate of 400millilitres per second

18 seconds

the volume of the tank is 12 x 20 x30 = 7200 cm^3

the tank therefore holds 7.2 liters.

400 milliliters = .4 liters

7.2/.4 = 18 the tank fills in 18 seconds

quantity of tank = 28x20x16 = 8960cu cm value of bypass in step with minute for the two faucets = a million.5 +a million.3 = 2.8 litres = 2800 cu cm Time taken to fill the tank could be 8960/2800 = 3.2 minutes or 3 minutes and 12 seconds.

12 * 20 *30=7200
7200/400= 18 mins

V = 12 x 20 x 30 cm³
V = 7,200 cm³
V = 7,200 ml
t = 7,200 / 400 sec
t = 18 sec

tap will take 12cm*20cm*30cm / 400cm^3 seconds = 18 seconds.

t = v/s
(time = volume/speed)

(12 x 20 x 30)/400
= (240 x 30)/400
= 7200/400
= 18 seconds

12*20*30/400 seconds.
1c.c = 1 ml.