Question
A car travels from town A to town B at 40 km/h and
returns from B to A at 50 km/h. If the distance between A and B is 100 km, find the average speed for the whole journey.Solution
Distance A to B = 100 km, B to A = 100 km Total distance = 200 km Time from A to B = 100 / 40 = 2.5 hours Time from B to A = 100 / 50 = 2 hours Total time = 2.5 + 2 = 4.5 hours Average speed = Total distance / Total time = 200 / 4.5 = 44.44 km/h Answer: 44.44 km/h
'A + B' means 'A is the father of B'. 'A - B' means 'A is the son of B'. 'A ÷ B' means 'A is the daughter-in-law of B'. 'A X B' means 'A is married to ...
- In the following expression: A ? B @ C $ D # E. What should come in the place of the question mark (?), to establish that A is the father of B?
‘W + X’, means ‘W is the sister of X’
‘W - X’, means ‘W is the daughter of X’
‘W × X’, means ‘W is the brother...
'A # B' means 'A is the brother of B'. 'A @ B' means 'A is the daughter of B'. 'A & B' means 'A is the husband of B'. 'A % B' means 'A is the wife of B'...
'A@B' means 'A is the mother of B'.
'A#B' means 'A is the son of B'.
'A$B' means 'A is the sister of B'.
'A%B' means 'A is t...
A # B' means 'A is the father of B'. 'A @ B' means 'A is the husband of B'. 'A & B' means 'A is the daughter-in-law of B'. 'A $ B' means 'A is the of si...
In the given relationship, ____ is related to ____ in the same way as M is related to E.
How is T related to S?
‘A@B’ means ‘A is the father of B’. ‘A#B’ means ‘A is the sister of B’. ‘A$B’ means ‘A is the brother of B’. ‘A%B’ means �...
If ‘A % B’ means ‘A is wife of B’, ‘A # B’ means ‘A is brother of B’, ‘A @ B’ means ‘B is son of A’, ‘A & B’ means ‘A is d...
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