Question

QA hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plasting it on the inside at the rate of ₹16 per 100 cm√2 ?​

Answer 1

Answer:

27.72

Step-by-step explanation:

d=10.5cm

r=2d=210.5=5.25

Curved surface area of hemisphere=2πr2=2π(5.25)2=173.25cm2

Cost of tin plating 100cm2=16Rs

Cost of tin plating 1cm2=10016Rs

Cost of tin plating 173.25cm2=10016×173.25=27.72Rs