Tutors Answer Your Questions about Surface-area (FREE)
Question 39623: A rigid windshield wiper on a road repair vechile has a length of 14 inches. The rubber wiper itself is 12 inches long. How great an area does it wipe clean if the arc through which it moves measures 100 degrees?
Click here to see answer by fractalier(6550)   |
Question 40669: This question is not from a text book. Therefore, I don't have anything to provide.
Please solve this in a step-by-step format:
The length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the perimeter is 29 cm, find the length of one of the equal legs.
Click here to see answer by checkley71(8403) |
Question 40669: This question is not from a text book. Therefore, I don't have anything to provide.
Please solve this in a step-by-step format:
The length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the perimeter is 29 cm, find the length of one of the equal legs.
Click here to see answer by Nate(3500) |
Question 40805: A cylindrical can has a horizontal base of radius 3.4 cm. It contains sufficient water so that when a sphere is placed inside, the water just covers the sphere. If the sphere fits exactly into the can, calculate
(a) The total surface area of the can in contact with the water when the shpere is inside, giving your answer correct to the nearest cm^2 (cm square).
(b) The depth of the water in the can before the sphere was put in, giving your answer correct to the nearest mm.
Click here to see answer by astromathman(21)  |
Question 41574: you do not have the topic that is appropriate for my question. Ill just type it anyway with the incorrect topic. I am having trouble with a section in my textbook called 10.4 and the title is "Factoring: Special Products" I am having trouble with questions like this one. Factor the expression: 9x^2-30xy+25y^2
Click here to see answer by Earlsdon(6294) |
Question 41793: Question
A swimming pool 25 m by 10 m has a concrete border all round. Find the area of the concrete border if it is 2.5 m wide at the sides and 5 m at the ends.
I wonder how does the diagram will look like ? Besides, I do hope you can help me to solve this. Thanks a lot.
Click here to see answer by psbhowmick(878)  |
Question 41925: Question
As many 8-cm diameter discs as possible are cut from a sheet of rectangular cardboard measuring 170 cm by 90 cm. Find the area of the sheet that is left.
Please help to solve this question.
Thank you very much.
Click here to see answer by fractalier(6550) |
Question 41921: Question
Find the total area of cardboard used in making a match box, complete with the sliding portion, 4 cm long, 2.5 cm wide and 1.2 cm deep (Please ignore the thickness of the cardboard).
Please help to solve this.
Click here to see answer by psbhowmick(878) |
Question 42075: Question
An open water tank with length 20 cm and width 15 cm holds 4.8 litres of water. Calculate the height of the water level in the tank and the total surface area of the cuboid in contact with the water.
This is what I have done
4.8 litre = 4800 cm^3 (cm cube) since 1 litre = 100cm^3
Let the height of the water level = h
Volume
= Length x width x height = 4800
20 x 15 x h = 4800
300h = 4800
h = 4800/300
h=16
Total surface area of the cuboid
= 2 ((length x width) + (length x height) + (width x height))
= 2 ((20 x 15) + (20 x 16) + (15 x 16))
= 2 (300 + 320 + 240)
= 2 (1100)
= 2200
But my teacher said that the answer is 1420 (for the total surface area). Who is right in this case ?
Please help. Tahnk you very much.
Click here to see answer by kev82(151) |
Question 42076: Question
A rectangular water tank of length 60 cm and width 40 m contains water up to a depth of 30 cm. A piece of ice measuring 20 cm by 15 cm by 12 cm is dropped into the tank of water. Calculate the new depth of water when the ice melts completely, assuming its volume decreases by 1/10.
Please help. Thank you very much.
Click here to see answer by psbhowmick(878) |
Question 42141: I need help finding the answer to this question.
The length of one of the equal legs of an isosceles triangle is 8 cm less than 4 times the length of the base. If the perimeter is 29 cm, find the length of one of the equal legs.
Click here to see answer by Paul(988) |
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