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Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

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At what rate percent compound interest per annum will Rs 640 amount to Rs 774.40 in 2 years?

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Find the rate percent per annum if Rs 2000 amount to Rs 2662 in \[1\frac{1}{2}\] years, interest being compounded half-yearly?

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Find the rate percent per annum, if Rs 2000 amount to Rs 2315.25 in an year and a half, interest being compounded six monthly.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Find the rate at which a sum of money will double itself in 3 years, if the interest is compounded annually.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Find the rate at which a sum of money will become four times the original amount in 2 years, if the interest is compounded half-yearly.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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A certain sum amounts to Rs 5832 in 2 years at 8% compounded interest. Find the sum.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Ishita invested a sum of Rs 12000 at 5% per annum compound interest. She received an amount of Rs 13230 after n years. Find the value of n.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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A sum of money deposited at 2% per annum compounded annually becomes Rs 10404 at the end of 2 years. Find the sum deposited.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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What sum of money will amount to Rs 45582.25 at \[6\frac{3}{4} %\] per annum in two years, interest being compounded annually?

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Sum of money amounts to Rs 453690 in 2 years at 6.5% per annum compounded annually. Find the sum.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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Find the height of a cuboid whose volume is 275 cm3 and the base area is 25 cm2.
[9] Mensuration
Chapter: [9] Mensuration
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A godown is in the form of a cuboid of measures 60 m × 40 m × 30 m. How many cuboidal boxes can be stored in it if the volume of one box is 0.8 m3?
[9] Mensuration
Chapter: [9] Mensuration
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Find CI paid when a sum of Rs. 10,000 is invested for 1 year and 3 months at `8 1/2%` per annum compounded annually.

[7] Comparing Quantities
Chapter: [7] Comparing Quantities
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A bank gives 10% Simple Interest (S.I.) on deposits by senior citizens. Draw a graph to illustrate the relation between the sum deposited and the simple interest earned. Find from your graph
(a) the annual interest obtainable for an investment of ₹ 250.
(b) the investment one has to make to get an annual simple interest of ₹ 70.
[13] Introduction to Graphs
Chapter: [13] Introduction to Graphs
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Ajit can ride a scooter constantly at a speed of 30 kms/hour. Draw a time-distance graph for this situation. Use it to find
(i) the time taken by Ajit to ride 75 km.
(ii) the distance covered by Ajit in `3 1/2` hours.
[13] Introduction to Graphs
Chapter: [13] Introduction to Graphs
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Solve: `(6x + 1)/3 + 1 = (x - 3)/6`

[2] Linear Equations in One Variable
Chapter: [2] Linear Equations in One Variable
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Solve: 5x - 2(2x - 7) = 2(3x - 1) + `7/2`

[2] Linear Equations in One Variable
Chapter: [2] Linear Equations in One Variable
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Solve the following:

1 – (x – 2) – [(x – 3) – (x – 1)] = 0

[2] Linear Equations in One Variable
Chapter: [2] Linear Equations in One Variable
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Denominator of a number is 4 less than its numerator. If 6 is added to the numerator it becomes thrice the denominator. Find the fraction.

[2] Linear Equations in One Variable
Chapter: [2] Linear Equations in One Variable
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Which of the following figures satisfy the following properties?

- All sides are congruent.

- All angles are right angles.

- Opposite sides are parallel.

[3] Understanding Quadrilaterals
Chapter: [3] Understanding Quadrilaterals
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