sampurple123
05.04.2020 •
Mathematics
A quantity x varies partly as the cube of y and partly varies inversely as the square of y. When y=2,x=108 and y=3, x=259. Find the value of x when y=6
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Ответ:
Area of rectangular prism is given by:
A=2(wl+hl+lw)
where w=width h=height, l=length
checking for given options
1. 8 ft, by 4ft by 3ft
Area = 136 square feet
5. 3 feet by 5 feet by 7 feet
Area =142 square feet
so our first and last option matches the requirement of area less than 160 square feet.