The radius of the base and the height of a solid right circular cylinder are in the ratio 2 : 3 and its volume is 1617 cm3. find the total surface area of the cylinder. 7. the rain water from a roof 22 m x 20 m drains into a cylindrical vessel having diameter of base 2 m and height 3.5 m of the vessel is just full, find the rainfall in cm. 8. find the discriminant of the quadratic equation:x3 3x2 +10x + 3 = 0 1
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Answered by
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r/h= 2/3
therefore , 3r= 2h
=> h=3r/2
___________(i)
πr²h=1617
⇒ πr²h* 3r/2
⇒r³ = 1617×7×2/22×3
⇒ r³ = 343
r= 7 cm
∴h= 10.5cm
and TSA = 2πr(r+h)
∴ TSA = 770 cm²
therefore , 3r= 2h
=> h=3r/2
___________(i)
πr²h=1617
⇒ πr²h* 3r/2
⇒r³ = 1617×7×2/22×3
⇒ r³ = 343
r= 7 cm
∴h= 10.5cm
and TSA = 2πr(r+h)
∴ TSA = 770 cm²
Answered by
6
Answer:
770 cm2
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