Question

solve this question....​

Answer 1

ANSWER:

height of well = 8m

radius of well = 21/2m = 10.5m

CSA of cylinder = 2πrh

= (2×8×10.5)m^2

= 168 m^2

cost of plastering = ₹(168 × 20) = ₹3360

THNKS!

Answer 2

Answer:beautiful answer for beautifull girl

Step-by-step explanation:

inner surface of the well =πrh

d=3.5m,h=10m.

then, inner surface of the well =2*π*3.5/2*10

=110m²

1m²=Rs45

110m²=110*45

=Rs4950.

yr cost hi to find krni thi