Question
The volume of a cube is 216 cm³. If the cost of
painting the cube is Rs. 12 per cm², then find the cost of painting five faces of the cube.Solution
Let the length of the edge of the cube be ‘x’ cm.
Volume of cube = x³
ATQ;
216 = x³
Or, x = 6
Area of five faces of the cube = 5x² = 5 × 6 × 6 = 180 cm²
Required cost = 180 × 12 = Rs. 2,160
Solve the given equation for ?. Find the approximate value.
[(9/10 of 449.88) - (30% of 299.78)] × [(√120.91 ÷ 11) + (1/3 of 600.11)] = ?<...
(18.21)² - (12.9)² = 20% of 649.9 - ? + 400.033
√440.98 + (17.95% of 249.96 – 12% of 99.99) + (7.12)2 = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
14, 27, 40, 53, 67, 79Â
79.99% of (84.89 × 5.99) - (3.89)2 × 21.87 = ?
{44.78% of (11.67 × 54.78)} ÷ 2.65 = ? + 19.25
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
44.87% of (39.85 × ?) – 1520.88 0.51 = 1400.8
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