Question

# A car moves with a speed of $40km/hr$ for $15minutes$ and then with a speed of $60km/hr$ for the next $15minutes$. The total distance covered by the car is:

A

$100km$

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

$25km$

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

$15km$

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

$10km$

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B $25km$Step 1: GivenSpeed of the car, ${v}_{1}=40km/hr\phantom{\rule{0ex}{0ex}}{v}_{2}=60km/hr$Time, $t=15mins=0.25hours$Step 2: Determine the distance covered with speed $40km/hr$${d}_{1}={v}_{1}×t\phantom{\rule{0ex}{0ex}}=40×0.25\phantom{\rule{0ex}{0ex}}=10km$Step 3: Determine the distance covered with speed $60km/hr$${d}_{2}={v}_{2}×t\phantom{\rule{0ex}{0ex}}=60×0.25\phantom{\rule{0ex}{0ex}}=15km$Step 4: Determine the total distance covered$d={d}_{1}+{d}_{2}\phantom{\rule{0ex}{0ex}}=10+15\phantom{\rule{0ex}{0ex}}=25km$Therefore, option B is the correct option.

Suggest Corrections
1