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
Which of the following sheep breeds is most suitable to produce finest carpet wool in
Which of the following type of monsoon is also known as retreating monsoon?
Main mechanism by which gaseous exchange occur between soil and atmosphere is
The excess of which of the following gases causes acid rain in the environment?
A situation when the rainfall deficiency is 25% or more of long term average, it is classified as
A day is considered as rainy day when ………………………rains during 24 hours.
The Culturable Command Area (CCA) for a minor irrigation project is …………
Which of the following crop is used for flax and oil both?
Which of the following element is indirectly related with drought resistance?
The Total amount of annual precipitation in the country in mm is
