Upstream speed = 273/7 = 39 km/h Downstream speed = 441/9 = 49 km/h Speed of boat in still water = (39 + 49)/2 = 44 km/h Speed of stream = (49 – 39)/2 = 5 km/h Increased speed of boat in still water = 44 + 4 = 48 km/h Decreased speed of stream = 5 – 2 = 3 km/h Required time taken = 540/(48 – 3) + 459/(48 + 3) = 12 + 9 = 21 hours
16(17/23) + 11(15/46) - 15(17/25) =? - 19(13/23)
45.45 × 11.67 + 14399.88 ÷ 8.01 + 124.79 = ?
At a village trade fair a man buys a horse and a camel together for Rs 51,250. He sold the horse at a profit of 25 % and the camel at a loss of 20 %. If...
287.97 ÷ √323.99 = ? + 4.05-2 × 64.05
420.11 ÷ 13.98 × 5.14 – 124.9 = √?
(1709.87 ÷ 38.09) + (768.11 ÷ 23.87) + (6599.81 ÷ 88.06) = ?
11.67 × 50.23 + ? = 14.88% of 600.44 + 9.66 × 8.272
36.22 of 249.98% + 299.99 ÷ 30.18 = ?
60.22 of 349.98% + 419.99 ÷ 14.18 = ?