Question

A car travels 90 km in 2 1/2 hours.
(a) How much time is required to cover 30 km with the same speed?
(b) Find the distance covered in 2 hours with the same speed.
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Answer 1

Answer:

90 km is covered in 150 minutes. Therefore, 1 km can be covered in minutes. Therefore, 30 km can be covered in 150 90 × 30 minutes i.e., 50 minutes.

Answer 2

Answer:

(a) in this case time is unknown and distance is known . therefore we proceed as follows

Step-by-step explanation:

21/2 hours -5/2hours 5/2in to 60min

thus 39 km can be covered in 50 minutes

(b) therefore distance covered in 2hours -36into 2- 72

thus in 2 hours the distance covered is 72