The speed of a boat in still water is 6 km/hr more than that of the current. The time taken by the boat to cover 675 km downstream is 13.5 hours. Find the total time taken by boat to travel 525 km downstream and 45 km upstream.
Therefore, downstream speed of the boat = 675/13.5 = 50 km/hr And, upstream speed of the boat = 6 km/hr Required time taken = (525/50) + (45/6) = 10.5 + 7.5 = 18 hours
654.056 + 28.9015 × 44.851 – 43.129 = ?
‘A’ and ‘B’ invested Rs. 5000 and Rs. 4200, respectively in a business, together. After 7 months, ‘A’ withdrew 25% of his initial investment...
(350/?) = 23 + 33
52% of 400 + √(?) = 60% of 600 - 25% of 400
5760 ÷ 45 × 15 = ?
√1225 ÷ √49 × √225 = ?2 – 6
525 ÷ 21 x 28 – 853 + 264 = ?
15 × 35 ÷7 + 60% of 300 =?
215 + 378 – 23 + 15 - 27 = ? + 3² + 16²
[4(1/3) + 4(1/4)] × 24 – 62 = ?2
