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As 20, 21 & 29 is satisfying Pythagoras so it is a right angle triangle. Total surface area of prism = Perimeter of base× Height + 2 × Area of base = (20 + 21 + 29) × 6 + 2 × (1/2 × 20 × 21) = 70 × 6 + 2 × 210 = 420 + 420 = 840 cm 2
A certain sum of money yields Rs. 3,310 as compound interest for 3 years at 10% per annum. The sum is (in rupees).
Rs. ’P’ invested at a rate of 15% p.a. compound interest (compounded annually) amounts to Rs. 8464 at the end of 2 years. Find the simple interest e...
A certain sum of money becomes 5 times of itself in 20 years at simple interest. In how many years does it become double of itself at the same rate of s...
A sum is lent on compound interest for 2 years at 14% p.a. If the compound interest on the sum is Rs.5392.8, find the sum.
A sum of ₹12,000 is invested for 3 years at a certain rate of simple interest. If the same sum was invested at the same rate for 2 years under compoun...
If a sum when placed at compound interest grows to Rs.6,400 in 2 yrs and to Rs. 8,000 in 3 yrs, find the rate percent p.a.
A certain amount of money, when invested at a simple interest rate of 'r%' per annum, grows to 6 times its original value in 24 y...
A sum of Rs. 2600 is invested at simple interest for 2 years. If the rate interest for first year is 10% p.a. while 18% p.a. for second year, then find ...
The simple interest on a sum of money is 9/35 of the sum. If the number of years is numerically 5/7 times of rate percent per annum, then the rate perc...
