If y ∝ x² and y = 36 when x = 3, find y when x = 5?
- 100
- 150
- 200
- None of these
Explanation
y = k × x²
Put y = 36, x = 3
36 = k × 3²
36 = k × 9
k = 4
Now y = 4 × x²
Put x = 5
y = 4 × 5²
y = 4 × 25
y = 100
Last verified on 04-05-2026
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