Question

A man goes to office by the speed of 30km/h he'll be late by 10 min but when goes with the speed of 40 km/h he will be 5 min late. At what time he must reach the office so that he will not be late?


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Answer 1

Answer:

x = 14 km

Step-by-step explanation:

To find the distance,

Let distance = x km.

Time taken at 3 kmph : dist/speed = x/3 = 30 min late.

time taken at 4 kmph : x/4 = 40 min earlier

difference between time taken : 40-(-30) = 70 mins = 70/60 hours.

x/3- x/4 = 70/60

x/12 = 7/6

x = 14 km.

Answer 2

Answer:

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Ramesh borrowed from Suresh certain sum for 2 years at simple interest.

He lent this sum to Dinesh at the same rate for 2 years compound interest.

At the end of 2 years Ramesh received H 110 as compound interest from Dinesh but

paid H 100 as simple interest to Suresh. Find the sum and the rate of interest.