Amit can do 50% more work than Bhushan in same time. Bhushan alone can do a piece of work in 30 hours. Bhushan starts working and had already worked for 12 hours when Amit joins him. How many hours should Bhushan and Amit work together to complete the remaining work?

Ravi took a loan from HDBC Bank for his 2-year MBA program at IIM. He took the loan of ₹6 lakh such that he would be charged at 8% per annum compound interest during his program and at 10% per annum compound interest after completion of course. He returned half of the amount whic…

A cylindrical box of radius 5 cm contains 10 solid spherical balls, each of radius 5 cm. If the top most ball touches the upper cover of the box, then the volume of empty space in the box is:

What value comes in place of question mark (?) in the following statements and arrange them in descending order. A. (5/9) × (225.40 − 45.4) = (?)² B. √1024 × 40 + (20)² + 0.5% of 9600 + 469 = (?)³ C. 8¹² ÷ 16² of 32³ × √256 = (2)^? D. 18⅓ + 9⅔ − 10⅓ = 1⅔ + ? Choose the correct an…

Given below are two statements: Statement I: The ratio of the circumference of two circles is 3:4, then the ratio of their area is 9:16. Statement II: If the circumference and the area of a circle are numerically equal, then the diameter is equal to 4. In the light of the above s…

In how many ways can the following prizes be given away to a class of 30 students, first and second in Mathematics, first and second in Physics, first in Chemistry and first in English?

Match List I with List II List I: (A) If 4a = 5b and 7b = 9c, then a : b : c is equal to (B) If A = 1/4 B and B = 1/2 C, then A : B : C is equal to (C) If P : Q : R = 2 : 3 : 4, then P/Q : Q/R : R/P is equal to (D) If a/7 = b/9 = c/11, then a : b : c is equal to List II: (I) 7 :…

A consignment of 15 wrist watches contains 4 defectives. The wrist watches are selected at random, one by one and examined. The ones examined are not replaced back. What is the probability that ninth one examined is the last defective?

Three vessels 'P', 'Q' and 'R' of same capacity are all full. Vessels 'P' and 'Q' contain mixture of milk and water in the ratios 4 : 1 and 7 : 3 respectively while vessel 'R' contains only pure milk. The contents of these vessels are poured into a larger vessel 'S'. After drawin…