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Let the length and speed of train be ‘l’ metres and ‘x’ m/s, respectively.
Then, according to question,
(l + 250)/18 = (l + 400)/27
3l + 750 = 2l + 800
l = 50
l = 50 metres
x = (l + 250)/18 = 300/18 ×(18/5) = 60 km/h
If the ratio of the sum invested and simple interest received after 1 year is 25:14 respectively, then find the rate of interest.
If a sum of Rs. 6,500 is to be borrowed for 2 years at 10% per annum compounded half-yearly, find the compound amount (integer values only).
Rs.700 amounts to Rs.742 in 2 years at a certain rate. If interest rate is increased by 2%, then what will be the new interest?