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A Tank 30 M Long, 24 M Wide, and 4.5 M Deep is to Be Made. It is Open from the Top. Find the Cost of Iron-sheet Required, at the Rate of ₹ 65 per M2, to Make the Tank. - Mathematics

Sum

A tank 30 m long, 24 m wide, and 4.5 m deep is to be made. It is open from the top. Find the cost of iron-sheet required, at the rate of ₹ 65 per m2, to make the tank.

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Solution

Length of the tank = 30 m

Width of the tank = 24 m

Depth of the tank = 4.5 m

Area of four walls of the tank = 2[L+B] x H = 2(30 + 24) x 4.5 = 2 x 54 x 4.5 m2 = 486 m2

Area of the floor of the tank = L x B = 30 x 24 = 720 m2

Area of Iron sheet required to make the tank = Area of four walls + Area of floor = 486 + 720 = 1206 m2

Cost of iron sheet required @ ₹ 65 per m2 = 1206 x 65 = ₹ 78390

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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 21 Surface Area, Volume and Capacity
Exercise 21 (B) | Q 10 | Page 241
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