Question
Find the time taken by boat D to cover downstream
distance, if the total time taken to complete the journey is 12.5 hours?Solution
Speed of boat D in still water = 6 km/hr Speed of stream = 2 km/hr Total time taken by boat D for entire journey = 12.5 hours Let, total distance travelled by boat D = d kms Upstream distance = 66% of d = kms Downstream distance = kms  Upstream speed = 4 km/hr Downstream speed = 8 km/hr Total time taken by boat D = Time taken for upstream + time taken for downstream + = 12.5 On solving the above equation, we get, d = 60 kms Downstream distance = = 20 kms Time taken = = 2.5 hours
Find the simplified value of the given expression:
(12 ÷ 3 of 2 + 11 of 2) ÷ 4
What will come in place of (?) in the given expression.
(15) ² - (13) ² = ?
What will come in place of the question mark (?) in the following expression?
(320 ÷ 8 + 22) × 4 = 60 + 40% of ?
52% of 36% of 810 = 72% of 18% of ?Â
- What will come in place of the question mark (?) in the following questions?
[{(3 × 54 × 21)/63} + 6] / 6 = √?Â
215 + 378 – 23 + 15 - 27 = ? + 3² + 16²
Find the value of ‘x’ if (5 × 196 – 340 ÷ 17) ÷ 20 = √1600 – x.
