Alicia Chin's answer to Hii's Secondary 2 Maths Singapore question.
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here is part C. However it doesn’t multiply to the total volume
Date Posted:
4 years ago
Thank you soo much i will check
clearly the volume must match.
since volume does not match, it means that something is not right somewhere. in such case, should immediately check the working.
the mistake is in the 3rd line of where the quadratic formula comes in. the -1 suddenly changes to (+)1.
the correct answers should be …
x = 9 or -10(reject)
when x =9 giving …
length = 14 cm
width = 12 cm
height = 10 cm
volume = 1680 cm3
since volume does not match, it means that something is not right somewhere. in such case, should immediately check the working.
the mistake is in the 3rd line of where the quadratic formula comes in. the -1 suddenly changes to (+)1.
the correct answers should be …
x = 9 or -10(reject)
when x =9 giving …
length = 14 cm
width = 12 cm
height = 10 cm
volume = 1680 cm3
Oh my, really sorry about my silly mistake. thank you so much for pointing that out
we are all human, and humans make mistakes, including myself.
mistakes are learning opportunities.
mistakes are learning opportunities.
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