chapter =surface area and volume class 10 go to question a 20m deep well with diameter = 7m is dug and the earth from digging is evenly spread out to form a platform 22m by 14m . find the height of the platform
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volume of well =volume of platform
So
volume of cylinder=volume of cuboid ----------(1)
Volume of cylinder = 22/7×7/2×7/2×20
= 770metercube
volume of cuboid =22×14×h
from( 1 )
770=22×14×h
770=308h
770/308=h
2.5=h
So
volume of cylinder=volume of cuboid ----------(1)
Volume of cylinder = 22/7×7/2×7/2×20
= 770metercube
volume of cuboid =22×14×h
from( 1 )
770=22×14×h
770=308h
770/308=h
2.5=h
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