If the sum of upstream and downstream speed is 30 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 84 km in downward?
Let the speed of boat in still water be x km/hr. According to the question, => x + 6 + x − 6 = 30 => x = 15 Downstream speed = 6 + 15 = 21 km/hr Required time = 84/21 = 4 hrs
3.3 Times 2/27 of 40% of 364=?
{(420 ÷ 28)% of 1400} ÷ 7 = ?
? ÷ [35% of 379 - 34(4/5)] = 0.4
2 X 25 + (30% of 80) ÷ (10% of 120) = ?
182 – 517 ÷ 11 - √361 = ?
√? = 120 - 102 + ∛125
262 × 15 + (?)² = 4099
(2 ÷ 3) × (4 ÷ 12) × (? ÷ 10) × 45 × (1 ÷ 5) = (? ÷ 6) + (2 ÷ 5)
2856 ÷ 34 = ?% of 240
