Q. At present a father is 4 times as old as his son. After 5 year the sum of their ages will be 55.…
Read moreQ. Twenty years ago, a mother was 4 times as old as her son and 4 years hence, she will be twice as…
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Q. A conical termite mound has a height of 1.4 m and a base of radius 60 cm. If there are three ter…
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