Question
The ages of A and B are in the ratio 5:7. If the sum of
their ages is 72 years, what will be A's age after 6 years?Solution
Let A's age be 5x and B's age be 7x. 5x + 7x = 72 → 12x = 72 → x = 6. A's current age = 5x = 30 years. A's age after 6 years = 30 + 6 = 36 years.
A body moves with uniform acceleration and covers 80 m in 4 s and 160 m in next 4 s. Find initial velocity.
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(B) Kirchhoff's loop law follo...
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