Word Problems on Surface Area of a Rectangular Prism

Q. A giant 10 ft. tall Kaleidoscope is to be given as a present to the local astronomical society. The Kaleidoscope is in the shape of a triangular prism with sides 3 ft, 4 ft and 5 ft, . It is to be gift-wrapped for a present. The cost of gift-wrapping is $\$2/ft$^2$. Assuming that there is no overlap of wrapping paper, how much will it cost to wrap the Kaleidoscope?

1. $ 248
2. $ 252
3. $ 260
4. $ 264

Q. A room is in the shape of rectangular prism with dimensions 20 ft $\times$ 12 ft $\times$ 10 ft. Cost of Painting the ceiling @ $\$5/{\text{ft}}^2$ is

1. $ 1200
2. $ 1400
3. $ 1500

Q. A rectangular prism has a length of $20$ cm, a breadth of $6$ cm and a depth of $14$ cm. How much is its total surface area (in cm${}^2$) ?

Q. A room is in the shape of rectangular prism with dimensions 20 ft $\times$ 12 ft $\times$ 10 ft. Cost of tiling the floor @ $\$12/{\text{ft}}^2$ will be

Q. If it takes one minute to wrap an area of unit meter square, find the time required (in hours) to cover this gift box on all the sides.

Q. If a prism of base $9cm\times 7cm$ can store $819cc$ of water, find its total surface area.

Q. If a 4 cuboids of dimension $4.2$ cm $\times$ $2.8$ cm $\times$ $7.5$ cm each is stacked sideways, what will be the lateral surface area of the newly formed prism?

1. $294$ cm${}^2$
2. $383$ cm${}^2$
3. $267$ cm${}^2$
4. $337$ cm${}^2$