jacob_1988
New member
- Joined
- Sep 18, 2013
- Messages
- 16
I have three questions regarding the image above, could someone please help me to understand the problem solving of these please? So I may be able to answer them correctly?
The diagram above shows an ingot of aluminum. The end is in the shape of a Trapezium.
Question: Find the volume of the ingot?
My answer: 1/2(7.4 + 15)x8 = 90. 90 x length = 2250cm2
1/2(a+b)xh.
Question: 1 cm3 of aluminum weighs 2.7g. How heavy is the ingot?
My answer: 6075g.
Question: Someone has to paint one of the ingots black for a scientific experiment. What is the area to be covered?
I don't know where to start on this one... please help