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If both the radius and height of a right circular cone are increased by 20%, its volume will be increased by
3 years ago, the average age of family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is:
3 yr ago, age Sum of Five Member = 85
Therefore present total of five member = 85 + 15 = 100 yr.
After Baby Birth average remain same = 17
∴ 6 Members
Total = 17 x 6 = 102
∴ Baby age = 2 yr.
(a – b)
= 0.96 – 0.1
= 0.86.
The ratio of ages of two students is 3 : 2. One is older to the other by 5 years. What is the age of the younger student?
The HCF of two numbers is 23 and the other two factors of their LCM are 13 and 14. The larger of the two numbers is:
Larger Number = 23 x 14
= 322.
Out of 450 students of a school 325 play football, 175 play cricket and 50 neither play football nor cricket, How many students play both football and cricket?
The correct answer is B as by drawing vein diagram 100 is the correct answer.
The length of a rectangle is decreased by 10% and its breadth is increased by 10%. By what per cent is its area changed?
A man can row at 5 kmph. in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
u + v = 6
u – v = 4
The average weight of A, B, C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is
80 + C = 135
B = 55
A + B = 80/ B + C = 86
55 + C = 86
C = 31.
A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. In what time can the son do it alone?
15 chairs
A = 3 ch
A + B = 5 ch
B = 2 ch
Some articles were bought at 6 for Rs. 5, and sold at 5 for Rs. 6. Gain per cent is:
C.P = Rs 25
S.P = Rs 36
Rs. 750 are divided among A, B and C in such a manner that A : B = 5 : 2 and B : C = 7 : 13. What is A’s share?
5 : 2
A truck covers a distance of 550 metres in 1 minute whereas a bus covers a distance of 33 kms in 45 minutes. The ratio of their speeds is:
3 : 4
If the ratio of areas of two squares is 225:256, then the ratio of their perimeters is:
If 30% of A = 0.25 of B = 1/5 of C, then A : B : C is equal to:
0.30 A = 0.25B = 0.2C
So ratio = 10 : 12 : 15
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
A number is increased by 20% and then again by 20%. By what per cent should the increased number be reduced so as to get back the original number?
Increase
Value to be decreased
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