Question

The odometer of a car reads 57321.0 km when the clock shows the time as 8:30 a.m. The odometer reading changes to 57336.0 km at time 8:50 a.m. The distance, moved by the car, in these 20 minutes, equals-

(a) 15 km
(b) 21 km
(c) 26 km
(d) 36 km​

Answer 1

${\purple{\underline{\underline{\bf{\pink{Solution:-}}}}}}$

$\mathfrak{\underline{AnswEr:-}}$

• The distance, moved by the car, in these 20 minutes is 15 km.

$\mathfrak{\underline{Given:-}}$

• The odometer of a car reads 57321.0 km when the clock shows the time as 8:30 a.m.
• The odometer reading changes to 57336.0 km at time 8:50 a.m.

$\mathfrak{\underline{Need\:To\: Find:-}}$

• The distance, moved by the car, in these 20 minutes = ?

${\purple{\underline{\underline{\bf{\pink{Explanation:-}}}}}}$

$\:\:\:\:\dag\bf{\underline \green{We\:know\:that:-}}$

$\star\: \: {\boxed{\sf\purple{Odometer\: reading\: changes - Odometer\:of\:a\:car\:reads}}}$

$\:\:\:\:\dag\bf{\underline \blue{Putting\:the\:values:-}}$

$\longrightarrow \sf {Distance\:moved\:by\:car = 57336.0 - 57321.0}$

$\longrightarrow \sf {Distance\: moved\:by\:car = 15\:km}$

$\:\:\:\:\dag\bf{\underline{\underline \red{Hence:-}}}$

• The distance, moved by the car, in these 20 minutes is 15 km.

$\:\:\:\:\dag\bf{\underline{\underline \blue{Thus:-}}}$

• Option (A) , 15 Cm is the correct answer.

$\rule{300}{2}$

Answer 2

Step-by-step explanation:

ANSWER

Distance =57336.0km−57321km=15km

Speed in km/min =15km/20min=3/4km/min

Speed in km/hr=15km/1/3hr

=(15×3)km/hr

=45km/hr.