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ATQ, Time taken by 'B' to complete the job alone = 20 × (100/45 ) = 40 days. Let the total work be 120 units. {LCM of 15 and 40}. Efficiency of 'A' and 'B' together = (120/15) =8 units/day. Efficiency of 'B' = (120/40) = 3 units/day. Efficiency of 'A' = 8−3 = 5 units/day. Time taken by 'A' to complete the work alone = (120/5) = 24 days.
The certain sum amounts to Rs 9,982.50 in 2(1/2) years at 12% p.a., interest compounded 10-monthly. The sum (in Rs) is:
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 sum of money amounts to Rs.767 in 3 years, and to Rs.806 in 4 years on simple interest at 6% annum. What is the sum?
A sofa of MRP 450 is available in Rs.90 cash down payment and 9 monthly equal installment of Rs.45 each. Find the rate of interest per annum.
