Question

hemispherical bowl has inner radius of 3.5 cm and a thickness of 1 cm what would be the cost to paint it internally at the rate of rupees 2 per centimetre square

Answer 1

C.s.a, of hemisphere =2pie R square =2*22/7*3.5*3.5=44*0.5*3.5=77.00 cm square. Cost of painting=2*77=RS.154.