In what ratio sugar of Rs 38 per kg and Rs 30 per kg be mixed with each other so that on selling mixture at Rs 35.2 per kg there will be a profit of 10%?
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The population of a town is 350000. It increases annually at the rate of 20%. What will be the population after 2 years?
If a--b = 4 and ab = 45, find the value of a3 - b3
(a – b)2 = a2 + b2 -2ab ⇒ 16 = a2 + b2 – 90 ⇒ a2 + b2 = 106 a3 – b3 = (a – b) (a2 + b2 + ab) ⇒ a3 – b3 = 4 X (106 + 45) ⇒ a3 – b3 = 4 X 151 ⇒ a3 – b3 = 604
If a - b = 10 and ab =-21, then what is the value of a3-b3 ?
The third proportional of two numbers 7 and 21 is
The sum of money that will yield Rs. 60 as simple interest at 6% per annum in 5 years is
Dev lent Rs. 8000 to Jairam for 17 years and Rs. 4700 to Karnik for 16 years on simple interest at the same rate of interest and received Rs. 21120 in all from both of them as interest. The rate of interest per annum is:
A shopkeeper cheats to the extent of 11% while buying and selling fruits, by using tampered weights. His total gain in percentage is
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