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Mathematics Quiz on speed and work: 03.06.2020

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Question 1

Pipes a and b can fill a tank in 10 hours and 15 hours respectively. Both together can fill itin—

Question 2

If A and B together can complete a work in 12 days, B and C together in 15 days and C and A together in 20 days, then B alone can complete the work in

Question 3

If 25 men complete a work in 24 days how many men will do the same work in 10 days

Question 4

8 men can finish a piece of work in 40 days. If 2 more men join with them, then the work will be completed in—

Question 5

An employer raises his workman’s hourly rate rate of wages in the ratio of 4:5, but reduces the hours of labour per week in the ratio 9 : 8 what will be the increase in total weekly wages bill which previously amounted to ₹ 585 ?

Question 6

The speed of a boat in a river is 20 km per hour and the speed of another boat is 23 km per hour. They travel in the same direction from the same place at the same time. The distance between the boats after three and half hours is

Question 7

Convert 10 m/s into km/h.

Question 8

A person travels from P to Q at a speed of 20 km/hour and returns from Q to P at a speed of 30 km/hour. Find the average speed of his total journey?

Question 9

A train 100 m long running at 18 kmph takes 30 seconds to cross a bridge. The length of the bridge is

Question 10

A car covers a distance of 528 km in a certain time at a speed of 66 km/hr. How much distance would a truck cover at an average speed which is 24 km/hr less than the speed of the car in a time which is 7 hours more than that taken by the car?
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