Answer: B) 5 m/h Explanation: As the distance travelled is constant, the time taken is inversely proportional to speed. Let 'u' be the speed of the current and 'v' be the speed of the boat. Speed of the boat downstream = v + u & upstream = v - u => v+u/v-u = 30/20 => v/u = 5 => v = 5u => v + u = 6u = 10/20/60 miles/hr => 6u = 30 m/h => u = 5 m/h

Answer: A) contains fluoride to harden the tooth enamel Explanation: Saliva is produced by the salivary gland which helps in food digestion.   Option A) contains fluoride to harden the tooth enamel is not the function of saliva.

Answer: A) Attraction of the Moon Explanation:

Answer: C) Debit cards Explanation: There are two payment types that will help you stick to your budget. 1. Cash2. Debit Card The amount in the debit card is the only amount you can spend to stay within budget. These method work because once you spend your money, you are done. You don’t have anything else to spend.   Credit cards, payday loans, and cash advances are all loans on future income. When you use a credit card, there is always just a little bit more you can spend. These types do not help you budget properly. In fact, these types encourage you to spend beyond your means and be out of budget.

Answer: A) Usha Ananthasubramanian Explanation:

Answer: B) very detailed reports Explanation: Managerial accounting is the process of identifying, measuring, analyzing, interpreting and communicating information for the pursuit of an organization's goals. This branch of accounting is also known as cost accounting.   Hence, the distinguishing feature of managerial accounting is very detailed reports.

Answer: B) 110 % Explanation: % Profit with respect to A = 40 + 50 + (40 x 50)/100 = 90 + 20 = 110 %.

Answer: C) 5% Explanation: C.I = P1+r100t-1   594.5 = 58001+r1002-1  594.55800+1=1+r1002   r100=1.05-1=0.05=> r = 5 % .