Question
The present ages of Aman and Rehan are in ratio 3:5. 5
years ago, the average age of Aman, Rehan and Tarun was 28 years. Aman was 11 years younger than Tarun at that time. Find Tarun's age 7 years hence.Solution
ATQ,
Let present ages = 3x, 5x, y
5 yrs ago: 3x–5, 5x–5, y–5
(3x–5 + 5x–5 + y–5) = 84
⇒ 8x + y – 15 = 84 ⇒ 8x + y = 99 ...(I)
Also, 3x = y – 11 ⇒ y – 3x = 11 ...(II)
(I) – (II): 8x + y – y + 3x = 99 – 11 ⇒ 11x = 88 ⇒ x = 8
Then y = 3x + 11 = 24 + 11 = 35
Tarun’s age 7 years hence = 42 years
Plants of which family are reported to assimilate CO2 in night
Cell of gram positive bacteria has a larger component of
The depth of water required by crops during the base period is called ______?
Which of the following crop is highly tolerant to alkalinity?
The condition where the plant is unable to produce a zygote with its own pollen is called as?
The type of market, when there is only one buyer of the product present in the market, is called:
Periwinkle is cultivated as
The pH value of alkali soil
Which of the following indicates a situation of hidden hunger in plants?
Betelvine (Piper betle L.) usually propagated by?
Relevant for Exams:
