Question
A was travelling from point X to point Y. He increased
his speed by 14 km/h after every hour. He reached his destination in 18 hours. If his initial speed was 20 km/h, then what was his average speed in the whole journey?Solution
Total distance travelled by A = (18/2) × {2 × 20 + (18 – 1) × 14} = 14 × (40 + 238) = 2502 km Required average speed = 2502/18 = 139 km/h
Bonsai culture has originated from which country?Â
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Filter chamber is not found i...
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Which is not a measure of central tendency?
Chemically most of the sand grains are
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