Question

Aditya has built a cubical water tank with lid for his house with each outer edge equal to 1.5m. He gets the outer surface of the tank including the base, covered with square tiles of side 25cm. Find how much he would spend on tiles if the cost of tile is Rs 480 per dozen?​

Answer 1

⠀⠀ıllıllı uoᴉʇnloS ıllıllı

$\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$

Given:

• The edge of the tank = 1.5m = 150cm
• Cost of 12 tiles = 480

Then:

Surface area of the tank = 5 x 150²

Area of each title = 25²

Therefore:

Number of title required = 5 × 150²/25² = 180

Cost of 1 tile = 480/12 = 40

➠180 × 40 = 7200

• Therefore, the cost of 180 tiles = Rs.7200

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Answer 2

Answer:

edge of the tank=150cm

surface area of the tank=5*150^2

area of each tile=25^2

so no of tiles req.=5*150^2/25^2=180

cost of 12 tiles =480

cost of 1 tile=480/12=40

cost of 180 tiles=180*40=7200....

hope it helps you...