How many metres of cloth 2.5 m wide will be required to make a conical tent whose base radius is 7 m and height is 24 m?

1. 120 m

2. 180 m

3. 220 m

4. 550 m

The length of the canvas, 1.1 m wide required to build a conical tent of height 14 m and floor area 346.5 m², is :

1. 490 m

2. 525 m

3. 665 m

4. 860 m

A conical tent is to accomodate 11 persons such that each person occupies 4 m² space on the ground and has 20 m³ of air to breathe. The height of the cone is :

1. 14 m

2. 15 m

3. 16 m

4. 20 m

The diameters of two cones are equal. If their slant heights are in the ratio 5 : 4 the ratio of their curved surface areas is:

1. 4 : 5

2. 5 : 4

3. 16 : 25

4. 25 : 16