Question

Q 21 plz answaer fastly hurry up

Answer 1

Hey,

I have written the answer in the picture above.

Hope it helps. You can clarify any further doubts.

☺️

Answer 2

it is given that c.s.a of cylinder=1320cm^2 and base radius =10.5

c.s.a of cylinder=2/pi rh

1320=2×22÷7×10.5×h

1320=66×h

h=1320/66=20

therefore,

height =20 cm

now,

volume of cylinder=/pi r^2h

=(22÷7)×10.5×10.5×20=6930cm^2