alleryA toy rocket has a cone of height 6 cm and base radius 2.5 cm. What is the cone's slant height?
A6.5 cm
B8.5 cm
C7 cm
D5.5 cm
Answer & Solution
Correct answer: A. 6.5 cm
1. Slant height l = square root of (r2 + h2).
2. l = square root of (6.25 + 36) = square root of 42.25.
3. l = 6.5 cm.
_Source: NCERT Class 10 Mathematics, Chapter 12 Surface Areas and Volumes, Example 3_
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