Question

In a building there are 30 cylindrical pillars The radius of each pillar is 42m and height is 7m Find the total cost of painting the curved surface area of all pillars at the rate of rupees 10 per m square

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

r = 42 m

h = 7m

so, by the formula for C.S.A of cylinder, we have

2πrh

$2 \times \frac{22}{7} \times \times 42 \times 7$

SOLVE THIS AND U WILL GET...,

$1848 \: {cm}^{2}$

SINCE THERE ARE TOTAL 30 PILLARS ,SO

$= 1848 \times 30$

$= 55440 \: {cm}^{2}$

$= 554.4 \: {m}^{2}$

Now, the cost of 1 m² = Rs. 10

so cost of 554.4 m² = 10 × 554.4 = Rs. 5544

HOPE IT HELPS. ;)