maths
posted by Anonymous .
A rectangular reservoir is 120m long,and 75cm wide .at what speed per hour must water flow into it through a square pipe of 20cm wide so that the water rises by2.4m in 18hrs.

maths 
Steve
to rise by 2.4m in 18 hours, the volume must increase by
120*.75*2.4 = 216 m^3/hr
the square pipe has crosssection area of .2^2 = .04 m^2
216 m^3/hr / .04m^2 = 5400 m/hr
Respond to this Question
Similar Questions

math
The spring runoff from melting snow from a certain region is being accumulated in a reservoir. The reservoir is 450 yards long; and its rosssection is an isosceles triangle 40 yards wide at the top and 20square root(3) yards high. … 
Physics
Water flows under pressure from one pipe into a second pipe having half the diameter. The volume flow rate in the narrow pipe is ________ that in the wide pipe, and the speed of the water in the narrow pipe is _______ that in the wide … 
math
Water is flowing at the rate of 15km/hr. Through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide.In how many hours will the water label in the tank raised by 21cm 
maths
Water is flowing at the rate of 15km/hr through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide. In how many hours will the water level in the tank raise by 21cm 
math
a rectangular tank,50cm long and 30cm wide,contains water upto a height of 9 cm.a box of dimensions 25cm,25cm,20cm is not placed in the tank so that its square faces rest on the bottom of the tank. the quantity of the water that must … 
maths
K, Q1.A sqhere of radius 5cm is lowered into a rectangular tank 50cm long and 20cm wide containing water to a deqth of 10cm.The sqhere floats with half of its surface above the level of the surface of the water.Calculate (a)the volume … 
maths
K, Q1.A sphere of radius 5cm is lowered into a rectangular tank 50cm long and 20cm wide containing water to a depth of 10cm.The sphere floats with half of its surface above the level of the surface of the water Calculate (a)the volume … 
cfgcfhbcncf
Water is flowing at the rate of 5km/hr through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and 44m wide. In how many hours will the water level in7 cm of tank to filled 
Maths
Water is flowing at a rate of 15 km/hr through a cylindrical pipe of radius 7cm into a rectangular tank which is 50m long and44m wide. In how many hours will the water level in the tank raise by 21 cm? 
Physics
Water flows into one end of a horizontal, cylindrical pipe at 2.0 m/s. The pipe then narrows until its diameter at the opposite end is only 1/3 of that at the beginning. (a) What is the flow speed at the narrow end of the pipe?