ICSE Class 7 Answered
A car X starts at 5 p.m. at a speed of 60 km/h. Another car You starts from the same point at 6:20 p.m. at a speed of 80 km/h. At what time will X and Y meet each other?
Asked by rkr2008 | 01 Dec, 2018, 08:58: AM
Expert Answer
When the car-Y starts from the starting place, car-X has already travelled for 1 hour 20 mins
Distance travelled by car-x before car-y starts = speed×time = 60×(4/3) = 80 km.
Let car-y meet car-x after t hours.
Distance travelled by car-y = (80×t) km
Distance travelled by car-x from starting time to the time it meets car-y = (80+60×t) km
when both the car meets, distance travelled by both of them is same.
Hence,we have (80×t) = 80+60×t)
80×t - 60×t = 80
20×t = 80
t = 80/20 = 4
Hence both the car will meet 4 hours after the starting time of car-y
Answered by Thiyagarajan K | 01 Dec, 2018, 11:10: AM
Application Videos
-
Algebraic Identities
This video explains the concept of Algebraic Identities. -
Expansion using Algebraic Identities_2
This video explains the concept of Expansion using Standard Algebraic Ident... -
Expansion using Algebraic Identities_1
This video explains the concept of Expansion using Algebraic Identities.
Concept Videos
-
Construction of Rhombus
Construction of rhombus given side and angle, both diagonals -
Construction of squares and rectangles
construction of square given side and diagonals,construction of rectangles -
Pair of Lines
parallel lines, transversals,corresponding angles, alternate angles,cointer... -
Surface Area: Cubes and Cuboids
cubes and cuboids, finding their surface area -
Construction of Parallel Lines
Construction of parallel lines using ruler and compass, setsquare
ICSE 7 - Maths
Asked by srilatha24latha | 25 Mar, 2024, 08:10: PM
ANSWERED BY EXPERTICSE 7 - Maths
Asked by arorahimanshi88 | 10 Mar, 2024, 03:37: PM
ANSWERED BY EXPERTICSE 7 - Maths
Asked by bhaskhar9043 | 03 Mar, 2024, 01:16: PM
ANSWERED BY EXPERTICSE 7 - Maths
Asked by sotorupa21 | 23 Feb, 2024, 11:39: AM
ANSWERED BY EXPERTICSE 7 - Maths
Asked by miloni77 | 22 Feb, 2024, 05:38: PM
ANSWERED BY EXPERT
ICSE 7 - Maths
Asked by renurajawat01234 | 07 Feb, 2024, 04:22: PM
ANSWERED BY EXPERT
