Question
There are three commodities –the first commodity has a
negative price, at −1 per unit; the second commodity is priced at +1 per unit while the third is priced at +2 per unit. Income of the person is Rs. 100 per day. Then which one of the following is not true?Solution
Solution If the consumer is consuming zero units of both first and second commodity and 60 units of third commodity, then it means that to consume 60 units of third commodity he will need Rs 120 (60× 2). Since the income of the consumer is only Rs. 100 per day, therefore he will not be able to consume 60 units with his given income. Therefore (c) is definitely not true.
If a person walks 25% more than of his usual speed, reaches his distance 90 minutes before. If the destination is 420 km away, then the usual speed of a...
A train was initially moving at 60 km/hr, then increased its speed by 15 km/hr after ‘z’ hours and continued for (z + 8) hours more. If the distance...
A motor car starts with a speed of 60 km/h and increases its speed after every two hours by 15 km/h. In how much time will it cover a distance of 360 km?
The aeroplane flies along a Square field @ 100, 200, 300 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole jo...
A tiger chases a deer that initially has a 96-meter head start, running away at 4 m/s, while the tiger pursues at 7 m/s. How long does it take for the t...
A man travels 450 km to his home partly by train and partly by car. He takes 8 hrs 40 minutes if he travels 240 km by train and rest by car. He takes 20...
A man walks from town A to town B at 5 km/h and returns from B to A along the same route at 3 km/h. If the total time taken for the round trip is 3 hour...
It takes 12 hours less to travel from point 'C' to point 'D' at a speed of 50 km/h than it takes to travel the same distance at 20 km/h. If 50% of the d...
The speeds of Car 'A' and Car 'B' are 25 km/hr and 45 km/hr, respectively. If Car 'A' covers a distance that is 36 km shorter tha...
A boat travels 600 metres against the stream in 20 seconds and returns the same distance with the stream in 15 seconds. Determine the speed of the boat ...