Question
A car travels from A to B at a speed of 60 km/h, and
returns from B to A at a speed of 40 km/h. What is the average speed of the car for the entire journey?Solution
Average speed for the entire journey = 2xy / (x + y) Where x = 60 km/h and y = 40 km/h. Average speed = 2 × 60 × 40 / (60 + 40) = 4800 / 100 = 48 km/h Correct Option: a
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In the following question, four words are given, out of which only one word is correctly spelt. Find the correctly spelt word.
The political retoric of foreign aggression is backed up by very brisk policing at home.
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(a) Tariff (b) Tarriff
(c) Tarif (d) Tarrif
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Choose the word with the correct spelling.
Choose the correct spelling from the options given.
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