Upstream speed = 294/7 = 42 km/h Downstream speed = 486/9 = 54 km/h Speed of boat in still water = (42 + 54)/2 = 48 km/h Speed of stream = (54 – 42)/2 = 6 km/h Increased speed of boat in still water = 48 + 4 = 52 km/h Decreased speed of stream = 6 – 2 = 4 km/h Required time taken = 720/(52 – 4) + 616/(52 + 4) = 15 + 11 = 26 hours
30.33% of 440.08 + 45.09 × 5.998 – √961.09 × 3.990 – 189.99 = ?
(32.15)2 – (255.89)(1/2) – (10648.08)(1/3) = ?
1519.98 ÷ 50.48 × 15.12 = ? × 4.16
2660.03 ÷ 94.98 x 59.9 = ? + 20.32
Amit and Bheem can individually finish a task in 10 days and 15 days, respectively. If they work together to complete the task an...
181.87 ÷ 13.89 X 8.13 + ? = 11.852
(20.23% of 780.31) + ? + (29.87% of 89.87) = 283
95.001% of 8219.99 - 4/9 % of 5399.98 + 109.99 = ?
(1680.23 ÷ 27.98) + (600.32 ÷ 23.9) + 1384.11 = ?