Question
A was travelling from point X to point Y. He increased
his speed by 12 km/h after every hour. He reached his destination in 16 hours. If his initial speed was 50 km/h, then what was his average speed in the whole journey?Solution
Total distance travelled by A = (16/2) × {2 × 50 + (16 – 1) × 12} = 12 × (100 + 180) = 2240 km Required average speed = 2240/16 = 140 km/h
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‘PARENTHOOD’.
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Select the word which cannot be formed using the letters of the given word using the letters only once.
GYMNASTIC
Which among the following words cannot be formed using the letters of the given word only once?
CONSIDERATE
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‘ EVERLASTING ’
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‘ DELIGHTFUL ’
...In the following question, select the word which can be formed using the letters of the given word 'DESCENT'.
