Question
The sum of three numbers is 226. If the ratio of the
first to the second is 4:5 and that of second to the third is 7: 10 then the second number is?Solution
Let the three numbers be A, B and C. Now, A:B = 4:5 B:C = 7:10 A: B: C = 28:35:50 A+B+C = 226 28k + 35k + 50k = 226 113k = 226 k = 2 Second number = B = 35 x 2 = 70
Which property of a wave is related to its frequency?Β Β
Rain drops acquire spherical shape due to -
A device used for converting A.C. into D.C. is called β
A metallic conductor of circular cross-section has radius R. If current density varies as J = Jβ(1βr/R), the total current through the conductor is:...
A parallel plate capacitor is half-filled with a dielectric slab (K = 4). What is its effective capacitance, assuming plate separation d?
If the specific heat at constant pressure Cβ is greater than Cα΅₯ , the difference Cβ -Cα΅₯ is equal to:
What is the telescope designed to search for earth-size planets in the nearby region of our galaxy, termed as?
The threshold wavelength for a photoelectric surface is 540 nm. Will a light of energy 2.5 eV cause photoemission?
Which device is best suited for measuring the temperature inside metallurgical furnaces?
When do spring tides occur?