The volume of a closed square based rectangular box is 1000 cubic metre. The cost of constructing the base is 15 paise per square metre and the cost of constructing the top is 25 paise per square metre. The cost of constructing its sides is 20 paise per square metre and the cost of constructing the box is Rs. 3.Find the dimensions of box for minimum cost of construction.
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A box `B_(1)` contains 1 white ball, 3 red balls, and 2 black balls. An- other box `B_(2)` contains 2 white balls, 3 red balls. A third box `B_(3)` co
Correct Answer - A P (required) = P (all are white) + P (all are red) + P (all are black) `=1/6xx2/9xx3/12+3/6xx3/9xx4/12+2/6xx4/9xx2/12=6/648+36/648+40/648=82/648`
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Convert : a. Exactly 1.5 atm to pascals b. 89 kPa to newton per square metre (N m^(-2))
a. Exactly 1.5 atm to pascals : 1 atm = 101325 Pa ∴ 1.5 atm = 1.5 × 101325 = 151987.5 Pa b. 89 kPa to newton per square metre (N m-2) : 1 Pa...
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The manufacturing cost of 10 articles is Rs. 150 Tax on each article is `6%` of the manufacturing cost. Transportation cost comes to Re. 1 per article
Correct Answer - `12(2)/(3)%`
2 Answers 2 views
(i) The base of an open rectangular box is square and its volume is ` 256 cm^(3)`. Find the dimensions of this box if we want to use least material fo
Correct Answer - (i) 8 cm, 8 cm, 4 cm (ii) Length = `80/(pi+4)" metre, Breadth "40/(pi+4)" metre,Radius "40/(pi+4)` metre
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Shiva can type `x` words per hour while Sreevias can type `y` words per hour. Shiva works for 5 hours per day and Sreenvias works for 7 hours per day.
Correct Answer - `5x + 7y ge 700`
2 Answers 1 views
The surface charge density of Earth is σ = -1.33 nC/m^2. That is about 8.3 × 10^9 electrons per square metre.
The Earth along with its atmosphere acts as a neutral system. The atmosphere (ionosphere in particular) has nearly equal and opposite charge. As a result, there exists a mechanism to replenish electric...
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An inverted cone has a depth of 40 cm and a base of radius 5 cm. Water is poured into it at a rate of 1.5 cubic centimetres per minutes. Find the rate
Correct Answer - `(1)/(10pi) cm//s`
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निम्न में से प्रत्येक को दशमलव रूप में लिखिए : `{:((a)20+4/10+1/1000,(b)137+5/100),((c)7/10+6/100+4/1000,(d)23+2/10+6/1000),((e)700+20+5+4/100,):}`
Correct Answer - `{:((a)29.41,(b)137.05,(c)0.764,(d)23.206,(e)725.09):}`
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Express as rupees using decimals. (a) 5 paise (b) 75 paise (c) 20 paise (d) 50 rupees 90 paise (e) 725 paise
Correct Answer - (a) रु 0.05 `" "`(b) रु 0.75`" "`(c ) रु 0.20 `" "`(d) रु 50.90 (e)रु 7.25
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The coefficient of cubical expansion of a solid is the increase in volume per unit original volume at 0 °C per degree rise in _________.
Correct option is: (C) temperature
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