Distance in downstream = 8km Time taken = 6 hours Rate of downstream (a) = distance/time = 4/3 km/hr Distance covered in upstream = 4km Time taken = 4 hours Rate of upstream (b) = distance/time =  1km/hr Speed in still water = 1/2(a+b) = 1/2(4/3+1) = 7/6 km/hr Time taken to cover (14km) in still water = distance/time = 14/(7/6) = 12 hours
30% of 800 - ?2 = 15Â
3/4 of 2000 + √1024 = ? + 12.5% of 3200
144% of 200 + 11% of 900 + 10% of 20 =?
1090 + 237 + 30549 - 86 - 104 = ? x 6
6269 + 0.25× 444 + 0.8× 200 = ? × 15
...4387897 – 3286871 – 51926 = ?
12 % of 72 × 25 – (x ÷ 20) × (16 ÷ 24) × 36 + 1/5 × x = (4 ÷ 12) × 36 ÷ 1/4
2/9 of 5/8 of 3/25 of ? = 40
∛157464 =?