Question
Which of these plants contains nitrogenfixing
bacteria?Solution
Gram (chickpea) is a leguminous plant that has nitrogen-fixing bacteria (Rhizobium) in its root nodules. These bacteria convert atmospheric nitrogen into a form that the plant can use, enriching the soil with nitrogen and improving its fertility.
A sum of Rs. 25600 is divided between 'Meera' and 'Nisha' in the ratio 9:7. If 'Nisha' invests her share in a scheme offering com...
A man invested a certain amount of sum at 12.5% per annum simple interest and earned an interest of Rs.2800 after 4 years. If the same amount is investe...
Sunil invested Rs. ‘4x’ in scheme ‘A’ offering simple interest of 25% p.a. and reinvested the interest earned from scheme ‘A’ at the end of ...
Anjali invested Rs.12000 in a scheme offering compound interest of x% p.a. compounded annually. If at the end of 2 years, interest received by her from ...
- A person invested Rs. ‘x’ in account A and Rs. ‘x/2’ in account B. Account A gives 4% simple interest per annum while account B gives 7%. After 5 y...
The interest received by investing Rs. 4500 for 2 years at compound interest of 20% p.a., compounded annually, was re-invested for 3 years at simple int...
Compound interest received after 2 years on ₹7000 at R% rate of interest compounded annually is ₹1164.8. Find the value of R.
A sum of money doubles itself in 8 years at simple interest. In how many years will it become four times itself at the same rate of interest?
Ravi lends Rs. 5,000 to two of his friends. He gives Rs.2500 to the first at 15% p.a. simple interest. Ravi wants to make a profit of 20% on the whole. ...
If a certain sum becomes 5 times of itself in 2 years when invested at certain rate (per annum) of simple interest, then find the rate of interest.
