Arithmeticmedium · Past Paper
Two numbers are in the ratio 3:5. If each number is increased by 10, the ratio becomes 5:7. The numbers are:
A15, 25
B3, 5
C30, 50
D12, 20
✓ Correct Answer: A — 15, 25
(3x+10)/(5x+10) = 5/7 => 21x+70 = 25x+50 => 4x=20 => x=5. Numbers are 15 and 25.
Share this question
More from Arithmetic
- If 15% of x = 20% of y, then x : y is:
- In how many years will Rs 2000 amount to Rs 2420 at 10% compound interest per annum?
- What is the time (T) if P = 500, R = 10%, and SI = 100?
- The value of a car depreciates from Rs 500,000 to Rs 405,000 in 2 years. Find the annual rate of depreciation.
- A man sold an article at 20% profit. Had he sold it for 20% loss, the SP would have been Rs. 100 less. Find CP.