71. Find the length of canvas 1.25 m wide required to build a conical tent of base radius 7 metres and height 24 metres.
A. 440m B.520m
C. 180m D.250m
Answer:
Here, r = 7m and h = 24 m.(www.naukribuzz.com)
So,l = Ö(r2 + h2) = Ö(72 + 242) = Ö (625) = 25 m.
Area of canvas = Õrl=((22/7)*7*25)m2 = 550 m2 .
Length of canvas = (Area/Width) = (550/1.25) m = 440 m.
