A water trough is 10m long and a cross-section has the shape of an isosceles triangle that is 50 cm wide at the top and 50cm high. If the trough is being filled with water at the rate of 4000 cm3/min, how fast is the water level rising when the water is 30 cm deep?.

3x3 = 9 and 2x2 = 4

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

i believe that the answer is

b. y-1=-2(x-4)

hope this !