a cylindrical block of wood has 70cm and length 2m is to be painted with blue coloured enamel The - Maths - Surface Areas and Volumes

Question

a cylindrical block of wood has 70cm and length 2m is to be painted
with blue coloured enamel The cost of painting is Rs 1 25 per
100cm2 Find the cost of painting the block

Varun.Rawat · Accepted Answer

We have,diameter of base of cylinder, d = 70 cmradius of base of cylinder, r = d2 = 35 cmNowm height of cylinder, h = 2 m = 200 cmTSA = 2πrh+r = 2×227×35200+35 = 2×22×5×235 = 51700 cm2Now, cost of painting 100 cm2 area = Rs 1
25So, cost of painting 51700 cm2 area = Rs 1
25100×51700 = Rs 646 25

a cylindrical block of wood has 70cm and length 2m is to be painted with blue coloured enamel. The cost of painting is Rs 1.25 per 100cm2. Find the cost of painting the block

a cylindrical block of wood has 70cm and length 2m is to be painted with blue coloured enamel. The cost of painting is Rs 1.25 per 100cm². Find the cost of painting the block