DSSSB · Mathematics
A research scientist needs to travel 240 km to attend a conference. She estimates her travel time based on her planned speed, but due to unexpected road construction, she has to drive 20 km/hr slower than planned for the entire journey. If this delay causes her to arrive 2 hours later than her initial estimate, what was her originally planned speed?
- 50 km/hr
- 55 km/hr
- 60 km/hr
- 45 km/hr
A research scientist needs to travel 240 km to attend a conference. She estimates her travel time based on her planned speed, but due to unexpected road construction, she has to drive 20 km/hr slower than planned for the entire journey. If this delay causes her to arrive 2 hours later than her initial estimate, what was her originally planned speed?
- 50 km/hr
- 55 km/hr
- 60 km/hr
- 45 km/hr
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