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We see rainbows because of the geometry of raindrops. When the sun shines from behind us into the rain, incident rays of light enter the drop and are refracted inwards. They are reflected from the back surface of the raindrop, and refracted again as they exit the raindropandreturntooureyes.Arainbowisan optical and meteorological phenomenon that is causedbyreflectionoflightinwaterdropletsin the Earth's atmosphere, resulting in a spectrum of light appearing in the sky.
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...
Find the period when simple interest on Rs.4000 at 6% per annum will be Rs.400.
A sum is lent on compound interest for 2 years at 9% p.a. If the compound interest on the sum is Rs.2257.2, find the sum.
Simple interest earned on an amount of Rs. 1000 at rate of R% per annum after 4 years is Rs. 280. Find the simple interest earned on an amount of Rs. 15...
The interest earned on investing Rs. 7000 for 2 years at the rate of 10% p.a., compounded annually, is used to purchase an article. If the article is la...
A man buys a car for ₹800,000. He sells it after 3 years at a loss of 15%. If he invests the selling amount in a fixed deposit at an interest rate (si...
What sum of money must be given at simple interest for 3 months at 4% per annum in order to earn Rs. 240 interest?
A man invested certain sum at simple interest of r% p.a. such that it amounts to 150% of itself in 5 years. Find the interest earned when Rs. 2200 is in...
A sum is lent on compound interest for 2 years at 14% p.a. If the compound interest on the sum is Rs.4194.4, find the sum.
An equal sum of money is invested in two schemes which offer interest at the same rate but one at simple interest and the other at compound interest (co...