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So, {(x + 850) × 0.12 × 2 = 552 0.24x + 204 = 552 x = 348/0.24 = 1450 So, required interest earned = 2 × 1450 × 0.21 = Rs. 609
What is the value of (a² + b²+4c²- ab-2bc-2ca) (a + b+2c):
If (10 a³ + 4b³): (11a³ — 15b³) = 7:5, then (3a + 5b): (9a - 2b) = ?
If (x + y) = 10 and xy = 21, then find the value of (x² + y²).
The coefficient of ‘b2’ in (3a + b)3 is
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