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Let the total work be 60 units (LCM of 12 and 20). A's rate of work = 60 / 20 = 3 units/day. A and B together = 60 / 12 = 5 units/day. B's rate of work = 5 − 3 = 2 units/day. Time taken by B = 60 / 2 = 30 days. Thus, the correct answer is 30 days . Ans. a
In a group of 104 employees, the ratio of male to female employees is 6:7. The average wage of a male employee is Rs. 45, and the...
Akshay invested Rs. 1650 in two schemes P and Q in the respective ratio of 7:4. Scheme P and Q are offering simple interest at the rate of 8% per annum ...
If sec x - tan x = 1/3, find sec x + tan x:
A man spends 35% of his income on food, 25% on rent, and the remaining amount on other expenses. If he saves ₹9,000, which is 20% of his income, find ...
Two individuals, A and B, started a business by investing ₹7,200 and ₹11,700, respectively. After 20 months, A withdrew his entire investment. At th...
Which of the following software is also known as the end-user program?
31.5 ÷ 1.75 × 6 – 12 = ? + 34
A container holds a mixture of milk and water in a 5:3 ratio. If 16 liters of the mixture is taken out and replaced with 16 liters of water, the ratio o...
A person deposits ₹12,000 in a bank offering a 5% interest rate compounded annually. After 2 years, how much interest will he have earned?
A product is sold at ₹720 after two successive discounts of 10% and 20%. Calculate the marked price of the product.
