Let the speed of boat in still water and speed of stream be 'x' km/hr and 'y' km/hr, respectively. According to question; (250/x) - (126/x) = 4 Or, (124/x) = 4 So, x = 31 Now, 5 x (31 + y) = 5 x (31 - y) + 10 Or, 155 + 5y = 155 - 5y + 10 Or, 10y = 10 So, y = 1 So, downstream speed of the boat = (31 + 1) = 32 km/hr And, upstream speed of the boat = (31 - 1) = 30 km/hr Required time taken = (233/32) + (100/30) ~ (7 + 3) ~ 10 hours
(15.98% of 399.99) - 6.998 = √?
26.23 × 31.82 + 44.8% of 1200 + ? = 1520
?2 = 159.97% of 65.004 + 319.98 ÷ 15.99 - 24
41.78% of 1499 + (9/13) × 389.84 = ?% of 1599.67 + 180.45
(22.03 + 89.98) ÷ 14.211 = 89.9 – 25.23% of ?
(88.931% of 435) + (61.521% of 516) = ?
119.98% of 80.02 - 15.12 × 2.02 + 19.95 = ?
(14.98% of 279.99) - 8.998 = √?
(33.95)2 – (25.004)2 + (18.0099)2 – (9.07)2 = ? - (14.990)2
60.22 of 349.98% + 419.99 ÷ 14.18 = ?