Speed of a boat in still water is 15 kmph and speed of stream is 12 kmph. A man rows to a place at a distance of 54 km and come back to starting point. The total time taken by him is:
ATQ, For upstream(against the stream), the effective speed is (V-S), where V is the speed of boat = 15km/h S is the speed of the styream = 12km/h downstream speed (v+s)=15+12=27km/h Upstream speed(V-S) = 15 - 12 = 3km/h Now, Total time = [Distance/speed] Time = (54/27) +(54/3) time = 2+18 =20hours
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
