A wooden toy is in the form of a sphere with a diameter of…

A wooden toy is in the form of a sphere with a diameter of 28 cm. Find the cost of polishing its surface at the rate of 50 paise per cm². (Take $\pi = {22\over7}$ )

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Correct answer: A

Explanation

The correct answer is Option 1 i.e. ₹1,232.

Radius(r) = $28\over2$ =14 cm

Surface area of sphere = 4πr²= 4 × $\frac{22}{7}$ × 14²

⇒ $4 × \frac{22}{7} × 196 = 4\times22\times28$ = 2464 cm²

Cost = 2464 × 0.50 = ₹1232

SSC MTS 2024 PYQ — Question 15