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The surface area of the sphere =61600cm2 4πr2 =61600 r2= (61600×7)22×4 =4900 r = =70cm =.7m 
=4312/3000 =4.312/3meter3
A is 4 years older than B while C is 6 years younger than B. The ratio of age of A, 5 years hence and age of B, 3 years ago is 3:2. What was age of C, 6...
Present ages of 'A' and 'B' are in the ratio 3:5, respectively. If B's age, 8 years hence from now will be 3 times of A's age, 2 years ago from now, the...
The average age of 20 girls is 54 years. If the age of two more girls is added the average decreases by half a year. What is the sum of the age of new g...
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
Ratio of present ages of A and B is 5:7, respectively. C who is 9 years older than A will become 36 years older after 12 years. Find the present age of B.
Mohit is 4 years older than Nittu. The present age ratio of Nittu to Pawan is 11:6. Additionally, Mohit's current age is twice that of Pawan's. Based on...
2n years ago, the age of Rahul was four times that of his son and n years ago, the age of Rahul was thrice that of his son. If n years later, the sum of...
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?
The present age of ‘P’ is 40 years, which is 33.33% more than that of ‘Q’. The average of present ages of ‘Q’ and ‘R’ is 45 years. The r...
