Need help with what ...?.???????
I could help you with math
90kg of sand had been puted in 3 bags but in 2+3+7=12 parts.
90kg/12=7.5kg
Small bag has 2 parts which is 7.5kg*2=15kg
Medium bag has 3 parts which is 7.5kg*3=22.5kg
Large bag has 7 parts which is 7.5kg*7=52.5kg
2:3:7=15kg:22.5kg:52.5kg
15kg+22.5kg+52.5kg=90kg
3:1
6:2
24:8
15:5
30:10
hope this helps, have a great day :)
We gots a triangular prism+ rectangular prism
easiest way is base times heigth and treat the triangle+rectangle on the side as the base
so
find the area of the side
the rectangle bit is area=7.5 times 7=52.5
the triangle bit is 1/2 times 7.5 times 7=26.25
total area is 52.5+26.25=78.75
and the height is 8
volume=8 times 78.75=630 cubic feet
answer is C