Question -
Answer -
Given,
Diameter to top ofbucket = 40 cm
So, the radius (r1)=┬а40/2 = 20 cm
Diameter of bottompart of the bucket = 20 cm
So, the radius (r2)= 30/2 = 10cm
Depth of the bucket(h) = 12 cm
Volume of the bucket =1/3 ╧А(r22┬а+ r12┬а+r1┬аr2┬а)h
=┬а╧А/3(202┬а+102┬а+ 20 ├Ч 10)12
=┬а8800 cm3
Now,
Given that the cost oftin sheet used for making bucket per┬аdm2┬а= Rs 1.20
So, the total costfor┬а17.87dm2┬а=┬а1.20 ├Ч 17.87┬а= Rs 21.40
Therefore, the cost oftin sheet used for making the bucket is Rs 21.40