Question
Speed of a boat in still water is 5 times more than the
speed of stream. If boat covers 147 km in downstream in 7 hours, then find the time taken by the boat to cover 135 km in upstream.Solution
Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 6 × x = 6x km/hr Downstream speed of boat = 6x + x = 7x km/hr According to question; 7x = 147/7 = 21 Or, x = 3 Upstream speed of the boat = 6x – x = 5x = 5 × 3 = 15 km/hr Required time taken = 135/15 = 9 hours
Evaluate: (768÷16)×(125÷25)−(81÷9)×12
[(4/3) + (5/6)] of 378 = ?
What will come in the place of question mark (?) in the given expression?Â
48 ÷ 4 × (3 + 5) – 6² + 10 = ?
What value should come in place of the question mark (?) in the following question?
1250 − ( 320 + 180 ) × ...
(360 - ?)/(25% of 96) = 13
What value will come in place of (?) question mark in the given expression.
3³ + 4² × 5 – 28 = ?
What value should come in the place of (?) in the following questions?
53 × 12 + 43 × 13= ? × 7 - 12% of 1300
2*1/3 + 22*1/3 + 222*1/3 + 2222*1/2 + 22222*1/2 = ?
Solve for the ?
(5832)1/3  × 10.11 × 11.97 ÷ 16.32 = ? + 45.022
