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Start learning 50% faster. Sign in nowLet the length and speed of the train ‘A’ be ‘l’ metre and ‘s’ m/s, respectively. According to question, l = 10s Also, 12s = 10s + 140 Or, 2s = 140 Or, s = 70 Therefore, length of train ‘A’ = 10s = 700 metres Length of train ‘B’ = 140 × (5/2) = 1750 metres Required time taken = 1750 ÷ 20 = 87.5 second
Shalini is younger than Rashi by 4 years. If the ratio of Shalini and Rashi ages is 8:9 respectively, then find the age of Shalini.
The current ages of 'Pankaj' and 'Ranjan' are in the ratio of 2:5. If Ranjan's age 13 years from now will be six times Pankaj's age 6 years prior to now...
The combined current ages of A, B, and C amount to 75 years. Five years from now, A's age compared to C's will be in the ratio of 5:7. Currently, B is 2...
The present ages of A and B are in the ratio 4:5. Sixteen years from now, B's age will be 15% more than A's age at that time. If C's current age is thre...
The present age of A is 4 years more than the present age of B. 5 years ago, A's age was twice that of B. What are the present ages of A and B?
The present age ratio of a father to his son is 15:7, and that of a mother to her daughter is 6:2. The mother is three years younger than the father, an...
Shalini is younger than Rashi by 3 years. If the ratio of Shalini and Rashi ages is 9:10 respectively, then find the age of Shalini.
In a family a couple has a son and a daughter. The age of the father is four times that of his son and age of her daughter is half of her mother. The wi...
The ages of A, B and C together are 60 years. B is thrice as old as A and C is 5 years older than A. What is the difference between ages of B and C?
‘A’ is 8 years younger than ‘B’ and 7 years elder than ‘C’. If the present age of ‘B’ and ‘D’ is 20 years and 15 years, respectively...
