1. A circular well of 21m depth is dug up so that the radius of the well is 1.5m. What is the volume of the earth dug up? A. 148.50 m³
B. 170 m³
C. 162.50 m³
D.182.50 m³
Since well is cylindrical in shape, ⇒Volume of well = [tex] \pi [/tex]r²h ⇒Volume =( 22 * 1.5 * 1.5 * 21)/7 ⇒Volume = 148.50 m³ Therefore, The correct option is A. 148.50 m³ Ans.
Well is cylindrical because top and bottom surface are circle and the well is also circular in shape. Height=21 m. Radius of well=1.5 m Therefore, Volume=πr²h =22/7*21*1.5*1.5 m³ =66*2.25 m³ =148.50 m³ Ans:The area is 148.50 m³(a)
