A closed cylindrical petrol tank lies on its side. It is 5 m long with diameter 1.4 m. Painting its whole outer surface costs ₹30 per sq m. Find the cost. (Take π = 22/7.)

Question

Accepted Answer

₹752.40. r = 0.7 m. TSA = 2 × 22/7 × 0.7 × (0.7 + 5) = 4.4 × 5.7 = 25.08 sq m. Cost = 25.08 × 30 = ₹752.40. ₹660 paints only the curved part; ₹706.20 includes one end.

A closed cylindrical petrol tank lies on its side. It is 5 m long with diameter 1.4 m. Painting its whole outer surface costs ₹30 per sq m. Find the cost. (Take π = $\frac{22}{7} .$ )

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More Class 8 Surface Area of a Cylinder practice

A closed cylindrical petrol tank lies on its side. It is 5 m long with diameter 1.4 m. Painting its whole outer surface costs ₹30 per sq m. Find the cost. (Take π = 722​.)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 8 Surface Area of a Cylinder practice

A closed cylindrical petrol tank lies on its side. It is 5 m long with diameter 1.4 m. Painting its whole outer surface costs ₹30 per sq m. Find the cost. (Take π = $\frac{22}{7} .$ )