The slant height of a cone is 10 cm and radius of the base is 7 cm, then Total Surface Area (TSA) = ……… cm^2.
The slant height of a cone is 10 cm and radius of the base is 7 cm, then Total Surface Area (TSA) = ……… cm2.
A) 374
B) 478
C) 474
D) 378
4 views
2 Answers
Correct option is: A) 374
We have
Slant height of the cone is l = 10 cm
and radius of the base of the cone is r = 7 cm
\(\therefore\) TSA of cone = \(\pi rl + \pi r^2\)
= \(\pi r (r + l)\)
= \(\frac {22}7\) \(\times\) 7 (7 +10) = 22 \(\times\) 17 = 374 \(cm^2\)
4 views
Answered