The radius and height of cylinder are in the ratio 5 is to 7 and its volume is 14850 CM cube find the curved surface area of the cylinder
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the ratio is equal to 5:7
therefore,5k/7k=radius /height ,where k is an integer
radius =5k , height=7k
volume = 14850
πr^2h=14850
r×r×h×22/7=14850
5k×5k×7k = 14850×7/22
k^3=675×7/5×5×7
k=3√27
k=3
radius =5×3=15
height=7×3=21
C.S.A of cylinder =2πrh
= 2×22/7×15×21
=44×45
therefore,5k/7k=radius /height ,where k is an integer
radius =5k , height=7k
volume = 14850
πr^2h=14850
r×r×h×22/7=14850
5k×5k×7k = 14850×7/22
k^3=675×7/5×5×7
k=3√27
k=3
radius =5×3=15
height=7×3=21
C.S.A of cylinder =2πrh
= 2×22/7×15×21
=44×45
vijay31504:
sorry answer is equal to 1980cm.sq
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