Soln: i. D PQR = D PSR i. PR divides ||gm area into equal...
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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...
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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...
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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...
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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 ...
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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 ...
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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...
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Q. Find unknown sizes of the angles.
Soln: < PQR = < QRS [∵ PQ || RS, being alternate angles] or, y = 2x From r PQR, < PQO + < OPQ = ...
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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 ...
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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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Q. The minimum charge of telephone call upto 175 calls is Rs 200 and for each additional call is Re. 1. If a man paid Rs. 328.90 with 10% VAT of his one month telephone bill, find how many extra calls of that month were made?
Soln: Here, the minimum charge of 175 calls = Rs 200 Let, the charge of telephone calls without 10%VAT = Rs x. x + 10% of x = Rs...
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