Tutors Answer Your Questions about Surface-area (FREE)
Question 549146: Hi there i hope you can help.
i need to work out the price of grass seeding.
i have worked out that need 122m squared of grass seed spread.
The price is spread (75g/ m squared) at £8.75 per 2.5kg box
I have completely lost all sense on this. can you help please.
Click here to see answer by stanbon(75887)  |
Question 549282: shanti sweets stall was placing an order for making cardboard boxes for packing their sweets.Two sizes of boxes were required.The bigger of dimensions 25cm*20cm*5cm and the smaller of dimensions 15cm*12cm*5cm.For all the overlaps, 5% of the total surface area is required extrs.If the cost of the cardboard is rs 4 for 1000 cm2 , find the cost of cardboard required for supplying 250 boxes of each kind.
Click here to see answer by mananth(16946)  |
Question 549543: hello please help me ans these question it is a revision of mathematics i was doing and got stuck. i am having an exam to write tomorrow.
[The value of is 3.142, correct to three decimal places.]
[The volume of a sphere is πr
3
.]
The diagrams show two ways of packaging 4 identical balls.
The radius of each ball is 3 cm.
Diagram I shows a closed rectangular box with a square base.
Each ball touches the top, the bottom and two sides of the box.
Each ball also touches two other balls.
Diagram II shows a closed cylinder.
The balls touch the ends and the side of the cylinder.
(a) (i) Write down the dimensions of the rectangular box. [1]
(ii) Calculate the total surface area of the outside of this box. [2]
(b) Calculate the total surface area of the outside of the cylinder. [2]
(c) Calculate the total volume of the 4 balls. [2]
(d) Calculate, correct to three decimal places, the value of
volume of the cylinder
––––––––––––––––––– . [2]
volume of the box
(e) Hence state which of the two containers has more space not occupied by the balls. [1]
Click here to see answer by Alan3354(69443)  |
Question 550010: 1. A swimming pool is 8 m long, 6 m wide and 1.5 m deep. The water resistant paint needed for the pool costs $6 per square meter.
a. How much will it cost to paint the interior surfaces of the pool?
b. How many liters of water will be needed to fill it?
2. The height of a cylinder is the same length as the circumference of its base. Its measured height is 125.66 cm. Calculate the surface area and volume of the cylinder.
4. A cube with an edge of 20 cm is filled with water. Would this amount of water fit in a sphere with a 20 cm radius?
5. How many square tiles (20 cm x 20 cm) are needed to coat the sides and base of a pool which is 10 m long, 6 meters wide and 3 m deep?
6. A 10 m long ladder is leaning against a wall. The bottom of the ladder is 6 m from the base of where the wall meets the ground. At what height from the ground does the top of the ladder lean against the wall?
7. A chord of 48 cm is 7 cm from the center of a circle. Calculate the area of the circle.
8. A square garden with a side length of 150 m has a square swimming pool in the very centre with a side length of 25 m . Calculate the area of the garden.
9. A wooded area is in the shape of a a trapezoid whose bases measure 128 m and 92 m and its height is 40 m. A 4 m wide walkway is constructed which runs perpendicular to the two bases. Calculate the area of the wooded area after the addition of the walkway.
Click here to see answer by Alan3354(69443) |
Question 550584: a rectangular shaped swimming pool is 12.5meters long and 10.5meters wide when my sister swims from one corner to the other corner diagonally opposite , how many meters to the nearest tenth of a meters does she swim ? . (please with solutions )
Click here to see answer by mananth(16946) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840
|
