Question

an open tank is in the shape of a cube. the measure of its inner size is 25 cm. calculate the cost of painting the inner sides at the rate of rs. 0.15 per sq. cm.

Answer 1

Heya.....

Here's your answer.....

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

Thanks...!!!

XD

Sorry baby 'wink'

Answer 2

Hence the cost of painting the inner side of the tank is rupees  468.75


Step-by-step explanation:  Surface area of the tank is:

                                                                = 5 x 25 x 25

                                                                = 3125

                                        Cost of painting is :   3125 x 0.15

                                                                           = 468.75