It takes 4 hrs for pipe A to empty a 100 liter tank; if another pipe B which is double the size of pipe A is employed, how long will it take to empty the tank? Sol. Since the Pipe is double the size,
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An artificial is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hrs to revolve around the earth.
Here, r = 42250 km = 42250000 m T = 24 h = 24 × 60 × 60 s Using Speed, v...
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The inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is 28 cm. The length of the pipe is 35 cm.
Here, inner radius (r) = 24/ 2 cm = 12 cm Outer radius (R) = 28/ 2 cm = 14 cm, h = 35 cm Volume of the wood used in the...
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A bag contains lemon flavoured candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out.
(i) As the bag contains only lemon flavored candies. So, the event related to the experiment of taking out an orange flavored candy is an impossible event. So, its probability...
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A large cylindrical tank has a hole of area A at its bottom. Water is poured in the tank by a tube of equal,
(c) The water level will rise to a height v2/2 g and then stop. EXPLANATION: Initially, the velocity of the water coming out of the tank will be negligible due to the...
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A concave mirror has a focal length of 20 cm. Find the position or positions of an object for which the imagesize is double of the object-size.
Case 1: When image is real v/u=-2x/x=-2 v= -2u 1/v+1/u=1/f=1/20 => 1/u-1/2u=1/20 =>1/2u=1/20 =>u=10 cm
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Work done by a sample of an ideal gas in a process A is double the work done in another process B.
The correct answer is (c) CA > CB
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An iron tank contains helium at a pressure of 2.5 atm at 250C .The tank can withstand a maximum pressure of 10 atm
P1 = 2.5 atm P2 = ? T1= 25o C =298 K T2 = 15350 C =1808 K According to Gay Laussac law, P1/ T1 = P2 / T2 P2 = 2.5 x 1080/ 298 =15.16 atm. Since...
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In track meets both 100 yards and 100 metres are used as distances; By how many metres is 100 metres longer than 100 yards?
We need to divide by 100 here just to convert cm to meter. 1 cm = 1/100 m Hope you understand
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If 15 pumps of equal capacity can fill a tank in 7 days, then how many extra pumps will be required to fill the tank in 5 days?
(a) No. of pumps required to fill a tank in 7 days = 15 ∴ No. of pumps required to fill a tank in 1 day = 15 × 7 = 105...
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What is the difference between a lake and a tank? (a) A lake is small and a tank is big
(d) Both are land-enclosed water bodies, but the latter is manmade.
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