Q12Short answerExercise 12.4
A milk container of height 16 cm is made of metal sheet in the form of a frustum of a cone with radii of its lower and upper ends as 8 cm and 20 cm respectively. Find the cost of milk at the rate of Rs. 22 per litre which the container can hold.
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15. 4m 16. 54 17. 1.584 m3 18. 90 cm 19.2.5 cm 20. 170.8 cm3