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In a field 30% are coconut trees, 40% of the rest are bananas trees, 42% of the rest are guava trees and still rest are mango trees. If the number of banana trees is 420, find the total number of tree

Given that for a soil deposit, K0 = earth pressure coefficient at rest, Ka = active earth pressure coefficient, Kp = passive earth pressure coefficient and u = Poisson's ratio, the value of (1 - μ) i

Statements:All fans are wires.Some wires are made of copper.No copper is made of gold.Conclusions:I. No fan is made of copper.II. Some copper are gold.III. No copper is made of gold.IV. Some fans are

Two satellite move in circular orbits around the Earth at distance 9000 km and from the centre of Earth. If the nearer satellite has a period of revolution of 90 minutes around the Earth, then the dif

An artificial satellite is moving in a circular orbit around the Earth with a speed equal to half the magnitude of escape velocity from the Earth. The height of satellite above the surface of Earth is

A satellite of mass m is revolving round the Earth at a height R above the surface of the Earth. If g is the gravitational intensity at the earth surface and R is the radius of the Earth, then the kin

Find the electric charge required on the earth and moon to balance their gravitational attraction if the charge on the earth is 12.5 times that on the moon.Mass of moon = 6.7 x 1022 KgMass of earth =

Rest of Earth is made up of

A man spends 10% of his income in house rent, 20% of the rest on his children’s education, 25% of the rest miscellaneous causes. If he now posses Rs. 1944 then his income is

It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train

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