Question

The radius of the base of a conical tent is
12 m. The tent is 9 m high. Find the cost
of the canvas required to make the tent if
one square metre of canvas costs
Rs 120?​

Answer 1

correct answer:

D) Rs. 67,824

step by step explanation:

r = 12 m, h = 9 m

l=r2+h2−−−−−−√=122+92−−−−−−−√=15m

Cost of canvas = curved surface area×cost of 1 m2

=πrl×120

=3.14×12×15×120=Rs.67824

Answer 2

The cost  of the canvas required to make the tent if  one square metre of canvas costs  Rs 120 is Rs.67824

Step-by-step explanation:

Radius of cone = 12 m

Height of conical tent = 9 m

Curved surface area of tent =$\pi r \sqrt{h^2+r^2}$

Curved surface area of tent =$3.14 \times 12 \times  \sqrt{9^2+12^2}$

Curved surface area of tent =$565.2 m^2$

Cost of 1 sq.m. canvas = Rs.120

Cost of 565.2 sq.m. =$120 \times 565.2 = Rs.67824$

Hence the cost  of the canvas required to make the tent if  one square metre of canvas costs  Rs 120 is Rs.67824

#Learn more:

The height of a cone is 16cm and its base radius is 12cm. Find the curved surface area and the total surface area of the cone?

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