Question

a rectangular metal block has length 10cm breadth 8cm height 2cm . Fron this block a circular hole of diameter 3.5 is drilled out. Calculate volume of remaining solid and its T.S.A

Answer 1

lenght..10cm
breadth..8cm
height..2cm
suface area of rectangular block= L×b×h=160cm
diameter of circular hole =3.5
radius 3.5/2
volume of hole= 4/3pie r^3
after calculation you will get 22.4583 cm approximately..
then 160-22.4583=137.5417cm (appr.) its the remaining area of solid....