Question

mean of 10 numbers is 20.If ,5 subtracted from every number, what will be the new mean​

Answer 1

Answer:

Given :

616

\longmapsto\tt\bf{r=14\:cm}⟼r=14cm

Now ,

For Curved Surface Area :

Using Formula :

\longmapsto\tt\boxed{C.S.A\:of\:Cylinder=2\pi{rh}}⟼

C.S.AofCylinder=2πrh

Putting Values :

\longmapsto\tt{2\times\dfrac{22}{{\cancel{7}}}\times{{\cancel{14}}}\times{5}}⟼2×

7

22

×

14

×5

\longmapsto\tt{44\times{2}\times{5}}⟼44×2×5

\longmapsto\tt{88\times{5}}⟼88×5

\longmapsto\tt\bf{440\:{cm}^{2}}⟼440cm

2

1. So , The C.S.A of Cylinder is 440 cm² .