Question
A well with 20 m inside diameter is dug 10 m deep. Soil
taken out of it has been evenly spread all around it to a width of 30 m to form an embankment. Find the height of the embankment.ÂSolution
Volume of the soil dug out = πr2h ⟹( (22)/(7) x 10 x 10 x 10) = 3,142.85m³. Area of embankment = Area of embankment with well - Area of well = ( x 40 x 40) - ( x 10 x 10 ) = 4,714 m² Height of embankment = (Volume)/(Area) = (3142.85)/(4714.3) = (2)/(3)m.
More Mensuration Questions
√3600% of 150 + 3/5 of 360 - ? = 210
52% of 36% of 810 = 72% of 18% of ?Â
315 ÷ 9 + 23 × 3+ 22 = ?× √441
(560 ÷ 32) × (720 ÷ 48) = ?
What value should come in the place of (?) in the following questions?
30% of 160 – 25% of 240 + 43 = ?
√0.49 + √6.25 + √1.44 + √1.21 =? % of 125
31% of 1900 - ? = 73
4.5 times 5/0.9× 35% of 240 =?
√? = 80% of 720 - 22% of 2500
{(81% of 800 + 28 × 4) – 27 × ?} = 11 × 20
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