The diameters of the top and the bottom portions of a bucket are 42 cm and 28 cm respectively. If the height of the bucket is 24 cm, then the cost of painting its outer surface at the rate of 50 paise / cm² is

(a) Rs. 1582.50

(b) Rs. 1724.50

(c) Rs. 1683

(d) Rs. 1642

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Solution

Radius of top of bucket

Radius of bottom of bucket

Height of bucket, h = 24 cm.

C.S.A. of the bucket

= 2750 cm²

Area of bottom

The cost of painting its C.S. ,

Hence, the correct answer is choice (c).

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The diameters of the top and the bottom portions of a bucket are 42 cm and 28 cm respectively. If the height of the bucket is 24 cm, then the cost of painting its outer surface at the rate of 50 paise / cm2 is (a) Rs. 1582.50 (b) Rs. 1724.50 (c) Rs. 1683 (d) Rs. 1642

Radius of top of bucket Radius of bottom of bucket Height of bucket, h = 24 cm. C.S.A. of the bucket = 2750 cm2 Area of bottom The cost of painting its C.S. , Hence, the correct answer is choice (c).

The diameters of the top and the bottom portions of a bucket are 42 cm and 28 cm respectively. If the height of the bucket is 24 cm, then the cost of painting its outer surface at the rate of 50 paise / cm² is

(a) Rs. 1582.50

(b) Rs. 1724.50

(c) Rs. 1683

(d) Rs. 1642

Radius of top of bucket

Radius of bottom of bucket

Height of bucket, h = 24 cm.

C.S.A. of the bucket

= 2750 cm²

Area of bottom

The cost of painting its C.S. ,

Hence, the correct answer is choice (c).