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Lamp A is less bright than Lamp B; Lamp B is less brighter than Lamp C; Lamp C is as bright as Lamp D. Lamp B is brighter than Lamp D and Lamp D is brighter than Lamp A. Which lamp is the brightest ?
Lamp A is less bright than Lamp B; Lamp B is Brighter than lamp C; Lamp C is as bright as Lamp D. Lamp B is brighter than Lamb D and Lamp D is better than Lamp A. Which is the brightest?
What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?
What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?
What is the difference between a CFL and an LED Lamp?
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than of an LED lamp.
3. A CFL is less energy efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
Four friends A, B, C and D need to cross a bridge. A maximum two persons can cross it at a time. It is night and they just have one lamp. Persons that cross the bridge must carry the lamp to find the way. A pair must walk together at the speed of slower person. After crossing the bridge, the person having faster speed in the pair will return with the lamp each time to accompany another person in the group. Finally, the lamp has to be returned at the original place and the person who returns the lamp has to cross the bridge again without lamp. To cross the bridge, the time taken by them is as follows: A :1 minute, B : 2 minutes, C : 7 minutes and D : 10 minutes. What is the total minimum time required by all the friends to cross the bridge?
Consider the following statements: A. The average life span of a CFL is much longer than that of an LED lamp. B. A CFL is less energy efficient as compared to an LED lamp. Which of the above statements is/are correct? Select the code for the correct answer from the options given below:
With reference to street-lighting, how do sodium lamps differ from LED lamps? 1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps. 2. As street lights, sodium lamps have a longer life span than LED lamps. 3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting. Select the correct answer using the code given below.  
In the question below are given four statements followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: All Chair are Fan. All Fan are Cushion. Some Cushion are Fruit. All Fruit are Lamp. Conclusions: I. Some Lamp are Fan. II. Some Fruit are Chair. III. Some Cushion are Lamp.                                       IV. All Chair are Cushion.
Last year Jaman bought two lamps. This year he sold them for BDT 2000 each . On one lamp, he made 25% profit and on the other lamp he had 25% profit and on the other lamp he had 25% loss, 'What was his net loss or profit? -