Question
Two cars start from a place with a speed of 20 km/hr at
an interval of 8 minutes. What is the speed of a man coming from the opposite direction towards the place if he meets the cars at an interval of 5 minutes?Solution
Distance covered in 8 minutes at 20 km/hr = 20 x (8/60) Distance covered in 5 minutes at (20 + x) km/hr = (5/60) x (20 + x) Now, Distance covered in 8 minutes at 20 km/hr = Distance covered in 5 minutes at (20 + x) km/hr ⇒ 20 x (8/60) = (5/60) x (20 + x) ⇒ 20 x 8 = 100 + 5x ⇒ 160 = 100 + 5x ⇒ 5x = 160 - 100 = 60 ⇒ x = 12 km/hr
What approximate value should replace the question mark?
12.45% of 640.20 − 60% of 2500 = ? − 9000.10
`[(7.99)^2 - (13.001)^2 + (4.01)^3]^2=` ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What value should come in place of question mark (?) in the following question. (You need not to calcualte the exact value)
?/647 = 226/ ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
A, B & C have Rs.1550 together. If they divide the money in the ratio 1:3:1 respectively. Find the difference of amount received by B and C.
What approximate value should come in the place of (?) in the following questions?
∛(92.8 + √1025) * ? = 16.06% of 750
√1024.21 × √624.89 ÷ 4.98 + 11.99 × 4.01 = ?
√784 × 3 + (713.99 ÷ 6.98) = ?% of 619.99
11.11% of (123.45 + 234.56) + 10.01³ - (5.05 of 7.07) = ? of (88.88 - 33.33)
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