Answer :

r1=10cm

r2=20cm


h=21cm



Vol. of socket =



Cost of 1L of milk = ₹ 40


Cost pr 15.4L of milk = 40× 15.4 =₹616


OR


R=3.5cm


H= 9.5-3.5=6cm



Vol. of the solid = vol. of hemisphere to vol. of cone.



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