Saved Bookmarks
| 1. |
From a solid cylinder of height 14 cm and base diameter 7 cm, two equal conical holes each of radius 2.1 cm and height 4 cm are cut off. Find the volume of the remaining solid. |
|
Answer» volume of cone=`1/3 pir^2h` given `r`=2.1cm and `h`=4cm Volume of two such cones=`1/3 xx22/7xx 2.1 xx 2.1xx4xx2=36.96(cm)^2` .volume of cylinder=`pir^2h` given `r`=3.5cm an `h`=14cm Volume of cylinder=`pi xx 3.5 xx3.5xx14=539(cm)^2` Residual volume=`(539-36.96)=502.04(cm)^2` |
|