ICSE Class 7 Answered
10. (i) train cover a dist~nce. of 670 km in 6 h 5 min. If it covers the first 390 km of the Journey at90 km/h, find Its speed for the rest of the journey.
(ii) A bus covers 630 km in 9 h. If it completes the first two thirds of the journey at 60 km/h.calculate its speed for the rest of the journey.
11. A train travelling at 60 km/h completes a journey in 8 h. How much faster would it have to travel to cover the same distance in 6 h?
11. A bus travelling at 42 km/h covers a distance in 5 h. How much time would it save if it increased its speed by 8 km/h?
11. A girl walks 12 km at the speed of 3 km/h. What change should she make in her speed to take (i) an hour less and (ii) an hour more to cover the distance?
4. A motorcyclist travels at 30 km/h and stops for half an hour at the end of every 75 km. How long will it take him to cover 375 km?
4. A woman walks a certain distance in 84 min. She covers two thirds of it at 4 km/h and the rest at 5 km/h, Find the total distance she covered.
6. A man walks at 6 km/h and runs at 8 km/h, He covers 6 km in 50 min partly by running and partly by walking.
(i) For how long did he walk? (It) What distance did he cover 'walking.
Asked by rojesh.sahoo | 13 Feb, 2019, 08:06: PM
Expert Answer
Ask only one question in one posting. Do not ask more than one question in one posting
Only first question is answered
-------------------------------------
Total distance travelled by train = 670 km
Time taken to travel 670 km = 6 hr 5 min = 
If first 390 km is travelled by 90 km/hr speed, then time taken = 390/90 = 13/3 hr.
Time left to travel remaining distance 280 km = 
required speed = 
Answered by Thiyagarajan K | 13 Feb, 2019, 10:05: PM
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
