An open tank is in the shape of a cube . The measure of its inner edge is 25 cm. Calculate the cost of painting the inner side at the rate of Rupees 0.15 per sq cm.
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inner side of cube = 25 cm
inner surface area = lateral surface area + bottom
= 4a² + a = 5a²
= 5 × 25 × 25
= 3125 cm²
cost of 1 me = Rs. 0.15
for 3125 cm² = Rs. 15 × 3125
= Rs. 468.75
inner surface area = lateral surface area + bottom
= 4a² + a = 5a²
= 5 × 25 × 25
= 3125 cm²
cost of 1 me = Rs. 0.15
for 3125 cm² = Rs. 15 × 3125
= Rs. 468.75
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