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A car is travelling at the average speed of 50 km/hr. How much distance would it travel in 12 minutes?
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68 boxes of a certain commodity require a shelf-length of 13.6 m. How many boxes of the same commodity would occupy a shelf length of 20.4 m?
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In a library 136 copies of a certain book require a shelf-length of 3.4 metre. How many copies of the same book would occupy a shelf-length of 5.1 metres?
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The second class railway fare for 240 km of Journey is Rs 15.00. What would be the fare for a journey of 139.2 km?
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If the thickness of a pile of 12 cardboards is 35 mm, find the thickness of a pile of 294 cardboards.
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The cost of 97 metre of cloth is Rs 242.50. What length of this can be purchased for Rs 302.50?
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11 men can dig \[6\frac{3}{4}\] metre long trench in one day. How many men should be employed for digging 27 metre long trench of the same type in one day?
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A worker is paid Rs 210 for 6 days work. If his total income of the month is Rs 875, for how many days did he work?
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A woker is paid Rs 200 for 8 days work. If he works for 20 days, how much will he get?
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The amount of extension in an elastic string varies directly as the weight hung on it. If a weight of 150 gm produces an extension of 2.9 cm, then what weight would produce an extension of 17.4 cm?
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The amount of extension in an elastic spring varies directly with the weight hung on it. If a weight of 250 gm produces an extension of 3.5 cm, find the extension produced by the weight of 700 gm.
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In 10 days, the earth picks up 2.6 × 108 pounds of dust from the atmosphere. How much dust will it pick up in 45 days?
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In 15 days, the earth picks up 1.2 × 108 kg of dust from the atmosphere. In how many days it will pick up 4.8 × 108 kg of dust?
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If \[x^2 + \frac{1}{x^2} = 18,\] find the values of \[x + \frac{1}{x} \text { and } x - \frac{1}{x} .\]
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If x + y = 4 and xy = 2, find the value of x2 + y2
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If x − y = 7 and xy = 9, find the value of x2 + y2
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If 3x + 5y = 11 and xy = 2, find the value of 9x2 + 25y2
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Find the value of the following expression: 16x2 + 24x + 9, when \[x = \frac{7}{4}\]
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Find the value of the following expression: 64x2 + 81y2 + 144xy, when x = 11 and \[y = \frac{4}{3}\]
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Find the value of the following expression: 81x2 + 16y2 − 72xy, when \[x = \frac{2}{3}\] and \[y = \frac{3}{4}\]
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