10 cylindrical pillars of a building have to be painted The diameter of each pillar is 70 cm and the...........

Quantitative Aptitude ( CCS) Mensuration 3D

10 cylindrical pillars of a building have to be painted. The diameter of each pillar is 70 cm and the height is 4m. What is the cost of painting at the rate of Rs. 10 per square metre?

790

850

880

920

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Explanation:

Answer & Explanation
Answer –C.880
Explanation :
CSA of 10 cyc= 10*2πrh
= 2 * 22/7 * 35/100 * 4
= 44*35*4/(700)
= 10*176*35/700
= 176*35 /70
Cost = 10*176*35/70
= 880rs