Question

A solid cylinder is of height 15 cm and diameter 7 cm. Two equal conical holes of radius 3 cm and
height 4 cm are cut off, one from each circular end. Find the surface area of the remaining solid.plz answer this​

Answer 1

Step-by-step explanation:

area of remaining solid

CSA of cylinder+CSA of cone+2(πR^2-πr^2)

2πRH+2πrl+2π(R^2-r^2)

2*22/7*7/2*15+2*22/7+*3*5+2*22/7(49/2-9)

22*15+22/7*30+2*22/7*31/2

330+660/7+682/7

2310+660+682/7

3652/7

521.714

521.71 cm^2