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Start learning 50% faster. Sign in nowLet the speed of boy in still water be X km/h. And the speed of current = 10 km/h Downstream speed = (X + 10) km/h Upstream speed = (X – 10) km/h Let time be ‘t’ hours. ⇒ [(X + 10) t]/6 = (X – 10) t ⇒ X + 10 = 6X – 60 ⇒ X = 14 km/h Downstream speed = 14 + 10 = 24 km/h Upstream speed = 14 – 10 = 4 km/h
The interest earned on investing Rs. 1000 for 2 years at the rate of 20% p.a., compounded annually, is used to purchase an article. If the article is la...
The difference between compound and simple interest on a sum of money for 2 years at 4% per annum is Rs. 626. The sum is:
Person K invested Rs. 4500 at a compound interest rate of 20% per annum (compounded annually) for 2 years, while person P investe...
Ajay invested Rs.a in SI at 5% rate of interest per annum for 8 years. Vishal invested the same amount in SI at 3% rate of interest per annum for 4 year...
A certain amount earns simple interest of Rs. 1600 after 4 years. Had the interest been 6% more, how much more interest would it have earned?
At what % of simple interest per annum will Rs. 600 amount to Rs. 720 in five years?
A sum of ₹15,000 is divided into two parts. One part is invested at 10% simple interest per annum, and the other part is invested at 15% simple intere...
If the simple interest for 5 years is equal to 20% of the principal, then the interest will be equal to the principal after ________ years.
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1560 and simple interest of Rs.1500 at the end of 2 year...
Aman invested 20% of an amount, denoted as Rs. 'P', in a compound interest scheme with an annual interest rate of 10%, compounded annually. After 2 year...
