Saturday

August 30, 2014

August 30, 2014

Posted by **lissa** on Friday, October 28, 2011 at 7:19am.

All other sides are rectangular.

The length of the pool is 12m.

The width of the pool is 4m.

The depth of the pool is 2.1m at the deep end and 1.1m at the shallow end.

Rafa fills the pool up with water from a hosepipe.

The surface of the water is to be 10cm from the top of the pool.

Rafa turns on the hosepipe at09 00 on Monday and water fills at a rate of 200ml per second.

When the pool is full, Rafa turns of the tap. At what time wil this be?

Show your working out.

- maths -
**Reiny**, Friday, October 28, 2011 at 9:20amI visualize two trapezoids as the side walls and rectangles as the end walls.

Volume = area of side wall x width

= 12 ((1.1 + 2.1)/2) ( 4) = 76.8 m^3

= 76.8(1000) L

= 76800 L

200 ml/sec = .2 L/sec

so time taken = 76800/.2 seconds

= 384000 seconds

= 6400 minutes

= 106.6667 hours or 4.44444.. days

= 4 days, 10 hours , 40 minutes

I will let you compute the time he turns off the tap

**Related Questions**

math - dimensions of a pool the perimeter of a rectangular swimming pool is 192 ...

math - A rectangular pool's depth is 1m at the shallow end and gradually ...

Algebra - width W or a rectangular swimming pool is 7x^2. The area of the pool ...

algebra 1 - the length of a rectangular swimming pool is 12 feet longer than two...

geometry - a a swimming pool having the shape of a rectangular solid has a ...

math - a certain company makes inflatable swimming pools that come in four ...

algebra - Essay. Show all work. the rectangular swimming pool is given by 2x^2-...

math - Find the area of a walkway that goes around a rectangular swimming pool. ...

physics - Consider a rectangular swimming pool of depth 2.3 m with a width and ...

business math - A swimming pool is in the form of a semicircular figure. Its ...