The rate of simple interest per annum at which a sum of money double itself in 162⁄3 yrs. is
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A man travelled a distance of 61 km. in 9 hours , partly by walking at speed of 4 km / hr and partly on bicycle at speed of 9 km / hr. The distance covered by walking is
If by selling an article for Rs. 390 a shopkeeper gains 20% , then the cost is
Three numbers are in the ratio 1 : 2 : 3 and the sum of their cubes is 4500 .The smallest numbers is
A fan is listed at Rs. 150 with a discount of 20% . What additional discount must be offered to the customer to bring the net price to Rs. 108 ?
If 7 spiders make 7 webs in 7 days , then 1 spider will make 1 web in how many days ?
Redistribution of income in a country can be brought about through
A motion that seeks to reduce the amount of demand presented by government to Rs. 1/- is known as