Question

Plyz solve this:

In the fromula V=22/7(R2-r2)h,make h the subject of the formula.Find h when V=3234,R=14, r=10.5

Answer 1

V = 227R2-r2h⇒7V22 = R2-r2h⇒h = 7V22R2-r2⇒h = 7×323422142-10.52= 226382214+10.514-10.5 {using the identity a2-b2 = a-ba+b}= 2263822×24.5×3.5= 12

Answer 2

the answer will be 147