Question:
( 1 of 10 ) At a certain speed a car covers a distance of 82 km in 2 hours. How much distance will it cover in 3 hour?
(A) 618 1/11% या 618.09%
(B) 927 1/11% या 927.09%
(C) 154 1/11% या 154.09%
(D) 309 1/11% या 309.09%
You selected
98.4 km
Correct Answer
123 km
Solution And Explanation
Solution
Given,
Distance = 82 km
Time = 2 hour
Thus, distance covers in 3 hour = ?
Here the speed and time are given. So, we need to find the speed to calculate the distance covers in the given time.
Method (1) Using Formula
Calculation of Speed using formula
Formula to find the speed
Speed = Distance/Time
= 82/2 = 41 km/h
Thus, speed = 41 km/h
Calculation of the distance in the given time using formula
Formula to find the distance
Distance = Speed × Time
= 41 km/h × 3 hour = 123 km
Thus, the distance covered in the given time = 123 km Answer
Method (2) Using Unitary Method
Calculation of the Distance using formula
Given,
Distance = 82 km
Time = 2 hour
Thus, distance covers in 3 hour = ?
∵ In 2 hours the distance covered = 82 km
∴ In 1 hour the distance covered = 82/2 km
∴ In 3 hours the distance covered
= 82/2 × 3 km
= 82 × 3/2 km
= 246/2 = 123 km
Thus, the distance covered in the given time = 123 km Answer
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(4) Find the distance covered by a cyclist in 21 hours if it covers a distance of 66 km in 11 hours.
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(8) An athlete takes 15 hours to finish a race of 75 km. Calculate the speed of athlete in meter per second.
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