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You arrive at your school 5 minutes late if you walk with a speed of 4 km/h, but you arrive 10 minutes before the scheduled time if you walk with a speed of 5 km/h. The distance of your school from your house (in km) is
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- 4
- 5
- 10
- 2
Correct Option: B
If the required distance be = x km, then
− | = | |||
4 | 5 | 60 |
⇒ | = | ||
20 | 4 |
⇒ | = | ||
20 | 4 |
⇒ x = | × 20 = 5 km. | |
4 |
Second Method :
Here, S1 = 4, t1 = 5
S2 = 5, t2 = 10
Distance = | |
S1 − S2 |
= | |
5 − 4 |
= 20 × | = 5 kms | |
60 |