A) \[240\,\,c{{m}^{2}}\]
B) \[250\,\,c{{m}^{2}}\]
C) \[260\,\,c{{m}^{2}}\]
D) \[280\,\,c{{m}^{2}}\]
Correct Answer: B
Solution :
[b] Let radius = r Slant height = 5x, 4x \[\therefore \] Curved surface area of smaller cane \[=\pi r\times 4x\] \[4\pi \,r\,x=200\] \[\pi \,r\,x=50\] \[\therefore \] Curved surface area of larger cane \[=\pi r\times 5x\] \[=5\pi \,r\,x=5\times 50\] \[=250\,c{{m}^{2}}\]You need to login to perform this action.
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