Question
A solid cube, whose edge is of length 60 cm, is melted.
Identical solid cubes, each of volume 216 cm3, are made of this molten cube, without any wastage. How many such small cubes are obtained?Solution
the number of small cubes = volume of big cube/volume of small  given- the volume of a small cube = 216cm3 side of big cube = 60 Then volume = 60×60×60= 216000cm3 now several small cubes= 216000/216  = 1000
A boy’s age is 130% of what it was 10 years ago, but 65% of what it will be after 10 years. What is his present age?
Amit age after 10 years will be 3 times his age 4 years back. What is the present age of Amit?
Currently, the combined ages of 'P' and 'Q' add up to 78 years. The ratio of 'P's age 2 years ago to 'Q's age 2 years in the futu...
A is 9 years older than B and B is 12 years younger than C. If the sum of the ages of A, B and C is 30 years, then what is B’s age after 12 years?
A is 6 years older than B who is four times as old as C. The total sum of the ages of A, B and C is 60. How old is B?
10 years ago, the ratio of the ages of Maya and Neil was 4:3. The present age of Jake is 10 years more than one-fourth of Neil’s present age. Find the...
Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 20 years. If their ages are in the arithmetic progression in the same order a...
The ratio of the present ages of father and his son is 9:5. The product of their ages 3 years ago was 33 times of his son’s age that year. What was so...
The ratio of the present ages of father and his son is 5:2. The product of their ages 4 years ago was 31 times of his son’s age that year. What wa...
- The average age of Neha and her uncle at present is 40 years. Neha's age 5 years from now will be one-fourth of the present age of her uncle. What is the c...
Relevant for Exams:
