A) 144 \[\pi \] sq m
B) 130 \[\pi \] sq m
C) 156 \[\pi \] sq m
D) 169 \[\pi \] sq m
Correct Answer: C
Solution :
Given, \[h=5m,\,\,l=13m.\] Let r is radius of the base. Hence, from \[\Delta \,\,PQC,\] \[{{13}^{2}}={{5}^{2}}+{{r}^{2}}\] or \[{{r}^{2}}=169-25=144\] or \[r=12\,m\] Hence, area of slant surface \[=\pi \,\,r\,l\] \[=\pi \times 12\times 13=156\,\pi \,\,sq.m\].You need to login to perform this action.
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