Question
Rs. 5000 when invested at simple interest of r% p.a.
amounts to Rs. 6000 in 24 months. If the same sum had been invested for 1 year at compound interest of (r + 20) % p.a. (compounded in every 4 months), then the amount received would be?Solution
According to the question, 6000 – 5000 = (5000 × r × 24) ÷ (12 × 100) Or, 1000 = 100 × r Or, r = 10 When the sum is invested at compound interest, Effective rate of interest = (r + 20) ÷ 3 = (10 + 20) ÷ 3 = 10% Effective time period = 1 × 3 = 3 units Amount received = Principal × {1 + (r/100)}time period = 5000 × {1 + (10/100)}3 = 5000 × (1.1)3 = 6655
The loudness of the sound depends uponÂ
‘Therm' is the unit of –
Electrical fuse is used to interrupt excess of _________.
Temperature of the Sun is measured by
Which atmospheric layer contains ozone layer?
Which pioneer of the late 19th century is credited with using radio waves for signal transmission over several kilometers?
For which type of motion, the distance time graph is not a straight line and can be any kind of curve?
What is the device used to amplify and modulate microwave frequency signals called?
How much calorie of energy is released by a boiled egg?
What is the SI unit of G — the universal gravitation constant?
