Question
In an Aerobic class, the average age of all the members
was 54.5 years, 11 members left the class and 7 new members joined. If the average age increased by 3 years and the total age decreased by 140, what was the number of members in the class initially?Solution
Let the original member be x Total age of these members = 54.5x Total age of (x – 4) members = (54.5x – 140) years According to the question, 54.5x – 140 = (x – 4) × 57.5 ⇒ 54.5x – 140 = 57.5x – 230 ⇒ 57.5x – 54.5x = 230 – 140 ⇒ 3x = 90 x = 30
Barium carbonate and aluminum phosphate are generally used in
Amount of water transpired by the crop to produce unit amount of dry matter is called _____
Fermentation method of seed extraction is practiced in which crop?
Which is/arecommon spoilage seen in canned foodÂ
Bray-1 test is used for
Khaira disease in rice is corrected by foliar spray of:
Which of the following is not included in green house gases?
In alley cropping systems, which of the following is a key consideration for choosing tree species to plant between crop rows?
In which year did the ICAR-National Bureau of Soil Survey and Land Use Planning (ICAR-NBSS & LUP) categorize India into different Agro-Ecological region...
What is the primary function of CCI in the current cotton scenario?
Relevant for Exams:
