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Archive for August 2017

Q. In the figure alongside, PQRS is a parallelogram. X and Y are any points on QR and RS respectively such that XY||QS. Prove that, Area of triangle PQX = Area of triangle PSY

Soln: i. D PQR = D PSR i. PR divides ||gm area into equal...

Q. At 30 degree celcius, 103g of saturated solution of sodium chloride contains 30.9g of sodium chloride. Find the solubility of sodium chloride at 30 degree celcius.

Soln: Here, Weight of saturated solution = 103g Weight of solute = 30.9g Weight of solvent = Wt. of saturated soln – wt. of sol...

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Q. At 30 degree celcius, 103g of saturated solution of sodium chloride contains 30.9g of sodium chloride. Find the solubility of sodium chloride at 30 degree celcius.

Soln: Here, Weight of saturated solution = 103g Weight of solute = 30.9g Weight of solvent = Wt. of saturated soln – wt. of sol...
Q. How much is more the value including 30% VAT on Rs. 2700 than Rs. 3060.

Soln: Value on Rs.2700 with 30% VAT = 2700 + 30% of 2700 = 2700 + 0.3*2700 = 2700 + 810 = 3510 More value = 3510 – 3060 ...
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1. How can the slide show be repeatd continously? a. Loop Continiously until 'Esc' b. Repeats continuously c. Loop more d. None...
Q. In the figure alongside, PQRS is a parallelogram. X and Y are any points on QR and RS respectively such that XY||QS. Prove that, Area of triangle PQX = Area of triangle PSY

Soln: i. D PQR = D PSR i. PR divides ||gm area into equal...
Q. In the adjoining figure, it is given that PQ=PR, MR=QN and ML||PN. Prove that MN and QL bisect each other.

Soln: <PQL = <MLR Being corresponding angles. ML = MR ...
Q. In given XYZ, XE is the bisector of angle YXZ. If YO perpendicular to XE and OM||XZ, prove that YM = MZ.

Soln: Constrution: Join O and A 1. In r s XYO and XAO i. <YXO = <AXO (A) i. XE is bisector of ...
Q. In the given figure, ABCD is a parallelogram and bisector of angle A bisects the side BC at P. Prove that AD = 2AB.

Soln: i. <DAP = <PAB i. AP bisects <A ii. <DAP = <APB ii. Being alternate angles iii. <PAB = <APB iii...
Q. In a house, four bulbs each of 60 watt glow for 5 hrs and an electric heater of 1200 watt is used 2 hrs every day. If the minimum charge upto 20 units is Rs. 80 and the charge for 21 units to 250 units is Rs. 7.30/unit, calculate the cost of electricity consumed in a month.

Soln: For 4 bulbs: Power = 4 * 60 = 240 = 0.24 kw Time = 5 hrs Power consumption (PC1) = 0.24 * 5 = 1.2 kwhrs For electr...
Q. If a man runs around a square field of area 8100 m^2 10 times in 30 minutes, find his speed in meter per second.

Soln: Area of square = 8100 m 2 or, l 2 = 8100 m 2 or, l 2 = 90 2 \ l = 90m Perimeter of square = 4l = 4 * 90 = 360m ...
Q. The minimum charge of telephone per month upto 100 calls is Rs 180 then the cost is Rs 3 per call of 4 minutes. A family paid Rs 1188 as telephone charge including 10% VAT. Find the total number of calls made.

Soln: Here, the minimum charge for 100 calls = Rs 180 Let the charge for telephone calls without VAT = Rs x So, x + 10% of x = 11...

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▼ 2017 (12)
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  - Q. In the figure alongside, PQRS is a parallelogra...
  - Q. At 30 degree celcius, 103g of saturated solutio...
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