Question

The internal and external diameters of hollow hemispherical vessel are 16 cm and 12 cm respectively. If the cost of painting 1 cm2 of the surface area is Rs. 5.00, find the total cost of painting the vessel all over

Answer 1

diameter:-

inner:-12cm
outer:-16cm
radius:-

inner:-6cm
outer:-8cm

rate of painting:-Rs 5/- per cm²

cost of painting=5(CSa of outer surface +CSa of inner surface)

inner csa=2πr²
=2×22/7×(6)²
=44/7×36
=226.2cm²


outer csa=2πr²
=2×22/7×(8)²
=44/7×64
=402.2cm²


cost of painting 5(total csa)
=5(226.2+402.2)
=5×628.4
=3142/-


show the cost of painting all over the hemispherical vessel will be=Rs 3142/-



hope it helps you in a friend plz mark as brainliest...