Question
A certain sum amounts to ₹22,494 in 7 years at x% per
annum on simple interest. If the rate of simple interest per annum had been (x + 4) %, the amount payable after 7 years would have been ₹25,917. Find the sum invested.Solution
Rate of interest per annum in 1st case =x% Rate of interest per annum in 2nd case =(x+4) Let the Sum =100y. ATQ- 
100y+7xy =22494 7xy =22494-100y … (1) In the second case – 
100y+7xy+28y=25917 128y+7xy =25917…put the value of eq (1) 128y+22494-100y=25917 28y=3423 Y=122.25 Total Sum =100×122.25 =12225.
Which of the following is a fumigant?
Yellow mosaic in soybean is spread by:
Among the following, which represents a true example of a biological control strategy used specifically against insect pests?
Green manure crop suitable for alkaline and water logged soil is
Market conduct not includes
Which pathogen is responsible for causing Tea Rust disease?
The grazing food web begins with:
The creation of utility by the way of marketing is called as
Full form of ICRISAT is
Which action helps in minimizing damage caused by fruit-sucking moths to citrus fruits?
Relevant for Exams:
